Orbital ATK’s unmanned Cygnus spacecraft is set to embark upon its return-to-flight mission tonight (Dec. 3), carrying more than 7,700 lbs. (3500 kilograms) of research materials, crew supplies and hardware for the International Space Station — and you can watch the liftoff live.
The Cygnus is scheduled to launch at 5:55 p.m. EST (2255 GMT) from Cape Canaveral Air Force Station in Florida aboard a United Launch Alliance Atlas V rocket, in the first liftoff for the freighter since Orbital’s Antares rocket exploded during a cargo delivery last October. (Cygnus will fly atop an Atlas V until a revamped version of Antares is ready to go.) The launch will initiate the fourth of eight resupply missions Orbital ATK is flying under a $1.9 billion contract with NASA. The live webcast of the OA-4 mission will begin at 4:30 p.m. EST (2130 GMT), and you can watch it here at Space.com, courtesy of NASA TV.
As of this morning, there’s a 60 percent chance that weather conditions will be favorable for the launch, U.S. Air Force officials reported. If the launch occurs on schedule, the spacecraft will reach the space station Sunday, Dec. 6, where NASA astronaut Kjell Lindgren will take point on capturing it via the station’s Canadarm2 robotic arm, assisted by NASA astronaut Scott Kelly. If weather conditions worsen, the team will attempt to launch again tomorrow (Dec. 4) for a Dec. 7 or Dec. 8 arrival.
Even though the Orbital ATK Cygnus freighter is on top of an ULA Atlas V rocket, this is an important flight for the Commercial Resupply Program.
SpaceX and the Russian Progress plan return to launches within thirty days.
The launch attempt was scrubbed before the window was officially closed due to deteriorating weather conditions. This is unusual, but not entirely expected when the probability of Go-for-Launch conditions dropped from 40% to 30% down to 10% throughout the day.
The next launch window opens at 5:33pm ET tomorrow, again lasting for 30 minutes. The weather forecast remains grim, with only a 30% chance of acceptable conditions. If it also gets scrubbed, the mission has additional windows on December 5th and 6th before mission planners need to get creative.
See rest here.
From another great post on Centauri Dreams:
The star HIP 85605 until recently seemed more interesting than it may now turn out to be. In a recent paper, Coryn Bailer-Jones (Max Planck Institute for Astronomy, Heidelberg) noted that the star in the constellation Hercules had a high probability of coming close enough to our Solar System in the far future (240,000 to 470,000 years from now) that it would pass through the Oort Cloud, potentially disrupting comets there. The possibility of a pass as close as .13 light years (8200 AU) was there, but Bailer-Jones cautioned that distance measurements of this star could be incorrect. His paper on nearby stellar passes thus leaves the HIP 85605 issue unresolved.
Enter Eric Mamajek (University of Rochester) and company. Working with data from the Southern African Large Telescope (SALT) and the Magellan telescope at Las Campanas Observatory in Chile, Mamajek showed that the distance to HIP 85605 has been underestimated by a factor of ten. As Bailer-Jones seems to have suspected, the new measurement takes the star on a trajectory that does not bring it within the Oort Cloud. But in the same paper, the team names an interesting system called Scholz’s Star as a candidate for a close pass in the past.
Studying the star’s tangential velocity (motion across the sky) as well as radial velocity data, the team found that despite being relatively close at 20 light years, Scholz’s Star shows little tangential velocity. That would imply an interesting encounter ahead, or one that had already happened. Mamajek explains:
“Most stars this nearby show much larger tangential motion. The small tangential motion and proximity initially indicated that the star was most likely either moving towards a future close encounter with the solar system, or it had ‘recently’ come close to the solar system and was moving away. Sure enough, the radial velocity measurements were consistent with it running away from the Sun’s vicinity – and we realized it must have had a close flyby in the past.”
Image: Artist’s conception of Scholz’s star and its brown dwarf companion (foreground) during its flyby of the solar system 70,000 years ago. The Sun (left, background) would have appeared as a brilliant star. The pair is now about 20 light years away. Credit: Michael Osadciw/University of Rochester.
The paper on this work, recently published in the Astrophysical Journal, determines the star’s trajectory, one that shows that about 70,000 years ago, it would have passed some 52,000 AU from the Sun. This works out to about 0.82 light years, or 7.8 trillion kilometers, quite a bit closer than Proxima Centauri, and probably close enough to pass through the outer Oort Cloud. The star was within 100,000 AU of the Sun for a period of roughly 10,000 years.
Scholz’s star (W0720) is a low-mass object in the constellation Monoceros also tagged WISE J072003.20-084651.2 and only recently discovered (by Ralf-Dieter Scholz in 2014) thanks to its dimness in optical wavelengths, its proximity to the galactic plane and its low proper motion. Adaptive optics imaging and high resolution spectroscopy has demonstrated that the star is actually a binary, an M-dwarf with a companion at 0.8 AU that is probably a brown dwarf.
The question that immediately comes to mind is what kind of object the Scholz’s star system would have presented in the night sky some 70,000 years ago. The answer is not dramatic, for at its closest approach the binary would have had an apparent magnitude in the range of 11.4 (note: there is a typo in the paper, as noted here, which had specified an apparent magnitude of 10.3). This is five magnitudes, or a factor of 100 times, fainter than the faintest naked eye stars. But the paper notes that M-dwarfs like this one are often given to flare activity that might have made Scholz’s star a brighter object. From the paper:
If W0720 experienced occasional flares similar to those of the active M8 star SDSS J022116.84+194020.4 (Schmidt et al. 2014), then the star may have been rarely visible with the naked eye from Earth (V < 6; ∆V < −4) for minutes or hours during the flare events. Hence, while the binary system was too dim to see with the naked eye in its quiescent state during its flyby of the solar system ∼70 kya, flares by the M9.5 primary may have provided visible short-lived transients visible to our ancestors.
And take a look at this graph, which Eric Mamajek published on Twitter yesterday.
As you can see, Scholz’s Star was moving out. If it had been visible, what would ancient skywatchers have made of it? We also have to wonder what other close encounters our Solar System may have had with other stars. Note this point from the paper about M-dwarfs:
Past systematic searches for stars with close flybys to the solar system have been understandably focused on the Hipparcos astrometric catalog (García Sánchez et al. 1999; Bailer-Jones 2014), however it contains relatively few M dwarfs relative to their cosmic abundance. Searches in the Gaia astrometric catalog for nearby M dwarfs with small proper motions and large parallaxes (i.e. with small tangential velocities) will likely yield addition candidates.
So much still to learn about M-dwarfs!
From Humans Are Free:
Majestic 12 (or MJ-12) was the code name of a secret committee of scientists, military leaders, and government officials, formed in 1947 by an executive order by U.S. President Harry S. Truman.
The purpose of the committee was stated in the Wilbert Smith memo to have been to investigate the slew of reports of “flying saucer” sightings that were then being received by U.S. military intelligence and in particular to look into the possible physics and technology of propulsion of the aerial objects that were being reported.
The formation of the committee is, because of the timing, widely believed to have been precipitated by the recovery of a UFO north of Roswell, New Mexico during 1947.
Indications of MJ-12’s existence may have first appeared in 1978 in declassified Canadian documents naming Dr. Vannevar Bush as heading a highly secret UFO investigation group within the U.S. Research and Development Board.
Since the first MJ-12 documents, thousands of pages of other leaked or declassified government documents mentioning MJ-12 and a government (including corporate elite) cover-up of UFOs have also appeared.
All of them are controversial, and a few have been proven to be unquestionably fraudulent, usually retyped rewrites of unrelated government documents.
The most notable “new” MJ-12 document is a lengthy, Linotype-set manual allegedly dating from 1954, called the MJ-12 “Special Operations Manual (SOM)”. It deals primarily with the handling of crash debris and alien bodies.
Another government group recently associated with MJ-12 was the CIA’s Office of National Estimates or ONE, a forerunner of the current National Intelligence Council (NIC).
ONE was created in 1950 by CIA director Gen. Walter Bedell Smith, alleged to have replaced Secretary of Defense James Forrestal on MJ-12 after his controversial death (officially declared suicide).
All the alleged original members of MJ-12 were notable for their military, government, and/or scientific achievements, and all were deceased when the documents first surfaced (the last to die was Jerome Hunsaker, only a few months before the MJ-12 papers first appeared).
The original composition was six civilians (mostly scientists), and six high-ranking military officers, two from each major military service. Three (Souers, Vandenberg, and Hillenkoetter) had been the first three heads of central intelligence.
Researchers in the UFO community have circulated increased rumors in recent months that the meeting between Eisenhower and people from another planet took place in the early 1950’s. Eisenhower, who was president from 1953 to 1961, is known to have had a strong belief in life on other planets.
The former five-star general in the United States Army who commanded the Allied Forces in Europe during the Second World War, was also keen on pushing the U.S. space program.
His meeting with the cosmic life forms is said to have taken place while officials were told that he was on vacation in Palm Springs, California, in February 1954.
The initial meeting is supposed to have taken place with aliens who were ‘Nordic’ in appearance, but the agreement was eventually ‘signed’ with a race called ‘Alien Greys’.
American astronauts will soon have new homegrown rides into space.
After a four-year competition, NASA has tapped the commerical spaceflight companies SpaceX and Boeing to launch astronauts to the International Space Station from U.S. soil by 2017, agency officials announced today (Sept. 16). If all goes according to plan, the two companies will reduce or end NASA’s dependence on Russia for its orbital taxi service. Russia’s Soyuz has been NASA’s only crew access to space since the space shuttle fleet retired in 2011.
“Today’s announcement sets the stage for what promises to be the most ambitious and exciting chapter in the history of NASA and human spaceflight,” NASA Administrator Charles Bolden told reporters today. [SpaceX’s Manned Dragon Spaceship in Pictures]
The choice reflects a melding of old and new; Boeing has been an aerospace mainstay for decades, while billionaire entrepreneur Elon Musk founded SpaceX just a dozen years ago, in 2002.NASA has picked SpaceX’s Dragon Version 2 manned spacecraft (left) and Boeing’s CST-100 space capsule to fly American astronauts to and from low-Earth orbit from U.S. soil for the first time since the shuttle fleet’s retirement in 2011. NASA announced the decision on Sept. 16, 2014 in a press conference at the Kennedy Space Center in Florida.
Filling the shuttle’s shoesSpaceX’s Dragon Version 2 spacecraft is a manned space capsule designed to fly seven astronauts to and from low-Earth orbit. See how SpaceX’s Dragon V2 spacecraft works in this Space.com infographic.
Credit: by Karl Tate, Infographics Artist
SpaceX and Boeing are splitting NASA’s $6.8 billion Commercial Crew Transportation Capability award, or CCtCap, the latest in a series of contracts set up in 2010 to encourage the development of private American manned spaceships. SpaceX will get $2.6 billion and Boeing will receive $4.2 billion, officials said. [Boeing’s CST-100 Space Capsule in Photos]
NASA is looking to the private sector to fill the crew-carrying shoes of the space shuttle fleet, which was retired in 2011 after 30 years of orbital service. For the past three years, the agency has relied on Russian Soyuz capsules to fly its astronauts to and from space — recently, at a cost of more than $70 million per seat.
NASA officials have said they want at least one American commercial vehicle to be up and running by late 2017. A domestic capability to and from low-Earth orbit could not only cut costs but also free the agency to work on getting people to more distant and difficult destinations such as Mars, Bolden said.
Four companies have been major players in NASA’s ongoing commercial crew competition: SpaceX, Boeing, Blue Origin and Sierra Nevada. SpaceX and Boeing are building capsules called Dragon and the CST-100, respectively. Blue Origin has been developing a conical craft called the Space Vehicle, while Sierra Nevada’s entry was a space plane called Dream Chaser.
Like SpaceX, Blue Origin is led by a billionaire — in this case, Amazon.com founder Jeff Bezos.
Today’s announcement apparently takes Blue Origin and Sierra Nevada out of the mix, but it doesn’t eliminate competition from the commercial crew program. Under the CCtCap contracts, both Boeing and SpaceX will be required to go through a rigorous certification process, which will include at least one manned demonstration mission to the space station, NASA officials said.
“NASA is committed to ensuring these systems are held to the same rigorous safety standards as previous human spaceflight programs,” said NASA commercial crew program manager Kathy Lueders.
After completing certification, Dragon and the CST-100 will each fly at least two, and perhaps as many as six, crewed NASA missions to and from the space station, Lueders added. Each of these crewed flights will carry four astronauts.
NASA will continue using both capsules as long as they meet the agency’s requirements, Bolden said.
Meet Dragon and the CST-100Boeing is developing the CST-100 capsule for use ferrying astronauts to Earth orbit and to the International Space Station. See how Boeing’s CST-100 spacecraft works in this Space.com infographic.
Credit: Karl Tate, SPACE.com Contributor
Both Dragon and the CST-100 are reusable vehicles designed to carry seven passengers. (CST-100’s name, incidentally, derives from “Crew Space Transportation” and 100 kilometers, or 62 miles — the traditional altitude boundary that marks the beginning of outer space.)
Dragon is an upgraded, manned version of the robotic capsule SpaceX uses to fly cargo missions to the space station under a separate, $1.6 billion NASA contract. The crew capsule will ride to space aboard SpaceX’s Falcon 9 rocket, as the cargo variant does.
The CST-100, meanwhile, will be lofted by United Launch Alliance’s Atlas 5 rocket. The Atlas 5 currently uses a Russian RD-180 engine, but that may change soon; United Launch Alliance — a joint venture of Boeing and Lockheed-Martin — is reportedly tapping Blue Origin to build a new, homegrown engine for the rocket.
Both capsules will launch from NASA’s Kennedy Space Center in Florida, officials said.
It’s too bad Sierra Nevada didn’t get a little money thrown its way, it would’ve been nice to have a mini-shuttle flying by 2017.
All in all, SpaceX has the most modern capsule design and it will serve NASA and commercial concerns for many years.
Here is another great post from Centauri Dreams, written by Andreas Hein. Good stuff.
2089, 5th April: A blurry image rushes over screens around the world. The image of a coastline, waves crashing into it, inviting for a nice evening walk at dawn. Nobody would have paid special attention, if it were not for one curious feature: Two suns were mounted in the sky, two bright, hellish eyes. The first man-made object had reached another star system.
Is it plausible to assume that we could send a probe to another star within our century? One major challenge is the amount of resources needed for such a mission. [1, 2]. Ships proposed in the past were mostly mammoths, weighing ten-thousands of tons: the fusion-propelled Daedalus probe with 54,000 tonnes and recently the Project Icarus Ghost Ship with over 100,000 tonnes. All these concepts are based on the rocket principle, which means that they have to take their propellant with them to accelerate. This results in a very large ship.
Another problem with fusion propulsion in particular is the problem of scalability. Most fusion propulsion systems get more efficient when they are scaled up. There is also a critical lower threshold for how small you can go. These factors lead to large amounts of needed propellant and large engines, for which you need a large space infrastructure. A Solar System-wide economy is probably needed, as the Project Daedalus report argues .
Image: The Project Icarus Ghost Ship: A colossal fusion-propelled interstellar probe
However, there is a different avenue for interstellar travel: going small. If you go small, you need less energy for accelerating the probe and thus less resources. Pioneers of small interstellar missions are Freeman Dyson with his Astrochicken; a living, one kilogram probe, bio-engineered for the space environment . Robert Forward proposed the Starwisp probe in 1985 . A large, ultra-thin sail which rides on a beam of microwaves. Furthermore, Frank Tipler and Ray Kurzweil describe how nano-scale probes could be used for transporting human consciousness to the stars [6, 7].
At the Initiative for Interstellar Studies (I4IS), we wanted to have a fresh look at small interstellar probes, laser sail probes in particular. The last concepts in this area have been developed years ago. How did the situation change in recent years? Are there new, possibly disruptive concepts on the horizon? We think there are. The basic idea is to develop an interstellar mission by combining the following technologies:
- Laser sail propulsion: The spacecraft rides on a laser beam, which is captured by an extremely thin sail .
- Small spacecraft technology: Highly miniaturized spacecraft components which are used in CubeSat missions
- Distributed spacecraft: To spread out the payload of a larger spacecraft over several spacecraft, thus, reducing the laser power requirements [9, 10]. The individual spacecraft would then rendezvous at the target star system and collaborate to fulfill their mission objectives. For example, one probe is mainly responsible for communication with the Solar System, another responsible for planetary exploration via distributed sensor networks (smart dust) .
- Magnetic sails: A thin superconducting ring’s magnetic field deflects the hydrogen in the interstellar medium and decelerates the spacecraft .
- Solar power satellites: The laser system shall use space infrastructure which is likely to exist in the next 50 years. Solar power satellites would be temporarily leased to provide the laser system with power to propel the spacecraft.
- Communication systems with external power supply: A critical factor for small interstellar missions is power supply for the communication system. As small spacecraft cannot provide enough power for communicating over these vast distances. Thus, power has to be supplied externally, either by using laser or microwave power from the Solar System during the trip and solar radiation within the target star system .
Image: Size comparison between an interplanetary solar sail and the Project Icarus Ghost Ship. Interstellar sail-based spacecraft would be much larger. (Courtesy: Adrian Mann and Kelvin Long)
Bringing all these technologies together, it is possible to imagine a mission which could be realized with technologies which are feasible in the next 10 years and could be in place in the next 50 years: A set of solar power satellites are leased for a couple of years for the mission. A laser system with a huge aperture has been put into a suitable orbit to propel the interstellar, as well as future planetary missions. Thus, the infrastructure can be reused for multiple purposes. The interstellar probes are launched one-by-one.
After decades, the probes start to decelerate by magnetic sails. Each spacecraft charges its sails differently. The first spacecraft decelerates slower than the follow-up probes. Ideally, the spacecraft then arrive at the target star system at the same point in time. Then, the probes start exploring the star system autonomously. They reason about exploration strategies, exchange and share data. Once a suitable exploration target has been chosen, dedicated probes descend to the planetary surface, spreading dust-sized sensor networks onto the pristine land. The data from the network is collected by other spacecraft and transferred back to the spacecraft acting as a communication hub. The hub, powered by the light from extrasolar light sends back the data to us. The result could be the scenario described at the beginning of this article.
Image: Artist’s impression of a laser sail probe with a chip-sized payload. (Courtesy: Adrian Mann)
Of course, one of the caveats of such a mission is its complexity. The spacecraft would have to rendezvous precisely over interstellar distances. Furthermore, there are several challenges with laser sail systems, which have been frequently addressed in the literature, for example beam collimation and control. Nevertheless, such a mission architecture has many advantages compared to existing ones: It could be realized by a space infrastructure we could imagine to exist in the next 50 years. The failure of one or more spacecraft would not be catastrophic, as redundancy could easily be built in by launching two or more identical spacecraft.
The elegance of this mission architecture is that all the infrastructure elements can also be used for other purposes. For example, a laser infrastructure could not only be used for an interstellar mission but interplanetary as well. Further applications include an asteroid defense system . The solar power satellites can be used for providing in-space infrastructure with power .
Image: Artist’s impression of a spacecraft swarm arriving at an exosolar system (Courtesy: Adrian Mann)
How about the feasibility of the individual technologies? Recent progress in various areas looks promising:
- The increased availability of highly sophisticated miniaturized commercial components: smart phones include many components which are needed for a space system, e.g. gyros for attitude determination, a communication system, and a microchip for data-handling. NASA has already flown a couple of “phone-sats”; Satellites which are based on a smart phone .
- Advances in distributed satellite networks: Although a single small satellite only has a limited capability, several satellites which cooperate can replace larger space systems. The concept of Federated Satellite Systems (FSS) is currently explored at the Massachusetts Institute of Technology as well as at the Skolkovo Institute of Technology in Russia . Satellites communicate opportunistically and share data and computing capacity. It is basically a cloud computing environment in space.
- Increased viability of solar sail missions. A number of recent missions are based on solar sail technology, e.g. the Japanese IKAROS probe, LightSail-1 of the Planetary Society, and NASA’s Sunjammer probe.
- Greg Matloff recently proposed use of Graphene as a material for solar sails . With an areal density of a fraction of a gram and high thermal resistance, this material would be truly disruptive. Currently existing materials have a much higher areal density; a number crucial for measuring the performance of solar sails.
- Material sciences has also advanced to a degree where Graphene layers only a few atoms thick can be manufactured . Thus, manufacturing a solar sail based on extremely thin layers of Graphene is not as far away as it seems.
- Small satellites with a mass of only a few kilograms are increasingly proposed for interplanetary missions. NASA has recently announced the Interplanetary CubeSat Challenge, where teams are invited to develop CubeSat missions to the Moon and even deeper into space (NASA) . Coming advances will thus stretch the capability of CubeSats beyond Low-Earth Orbit.
- Recent proposals for solar power satellites focus on providing space infrastructure with power instead of Earth infrastructure [18, 19]. The reason is quite simple: Solar power satellites are not competitive to most Earth-based alternatives but they are in space. A recent NASA concept by John Mankins proposed the use of a highly modular tulip-shaped space power satellite, supplying geostationary communication satellites with power.
- Large space laser systems have been proposed for asteroid defense 
In order to explore various mission architectures and encourage participation by a larger group of people, I4IS has recently announced the Project Dragonfly Competition in the context of the Alpha Centauri Prize . We hope that with the help of this competition, we can find unprecedented mission architectures of truly disruptive capability. Once this goal is accomplished, we can concentrate our efforts on developing individual technologies and test them in near-term missions.
If this all works out, this might be the first time in history that there is a realistic possibility to explore a near-by star system within the 21st or early 22nd century with “modest” resources.
I remember when the original Project Icarus study came out in the 1970s and I was absolutely enthralled with it.
At last, interstellar exploration could be possible, not fantasy.
Then the Icarus came out a couple of years ago. The ship was more advanced, but the size doubled. How is that possible in this age of miniaturization?
I think it’s because people love the idea of Battlestar Galactica or U.S.S. Enterprise sized interstellar craft.
You gotta have powerful engines and weapons to cope with angry aliens, right?
Andrea Hein is being smart and paying respect to Robert Foward and Freeman Dyson by writing this study with up to date ideas which encompasses Cube Sat tech and other commercial space company technologies.
Paul Gilster posts:
In interstellar terms, a ‘fast’ mission is one that is measured in decades rather than millennia. Say for the sake of argument that we achieve this capability some time within the next 200 years. Can you imagine where we’ll be in terms of telescope technology by that time? It’s an intriguing question, because telescopes capable of not just imaging exoplanets but seeing them in great detail would allow us to choose our destinations wisely even while giving us voluminous data on the myriad worlds we choose not to visit. Will they also reduce our urge to make the trip?
Former NASA administrator Dan Goldin described the effects of a telescope something like this back in 1999 at a meeting of the American Astronomical Society. Although he didn’t have a specific telescope technology in mind, he was sure that by the mid-point of the 21st Century, we would be seeing exoplanets up close, an educational opportunity unlike any ever offered. Goldin’s classroom of this future era is one I’d like to visit, if his description is anywhere near the truth:
“When you look on the walls, you see a dozen maps detailing the features of Earth-like planets orbiting neighboring stars. Schoolchildren can study the geography, oceans, and continents of other planets and imagine their exotic environments, just as we studied the Earth and wondered about exotic sounding places like Banghok and Istanbul … or, in my case growing up in the Bronx, exotic far-away places like Brooklyn.”
Webster Cash, an astronomer whose Aragoscope concept recently won a Phase I award from the NASA Innovative Advanced Concepts program (see ‘Aragoscope’ Offers High Resolution Optics in Space), has also been deeply involved in starshades, in which a large occulter works with a telescope-bearing spacecraft tens of thousands of kilometers away. With the occulter blocking light from the parent star, direct imaging of exoplanets down to Earth size and below becomes possible, allowing us to make spectroscopic analyses of their atmospheres. Pool data from fifty such systems using interferometry and spectacular close-up images may one day be possible.
Image: The basic occulter concept, with telescope trailing the occulter and using it to separate planet light from the light of the parent star. Credit: Webster Cash.
Have a look at Cash’s New Worlds pages at the University of Colorado for more. And imagine what we might do with the ability to look at an exoplanet through a view as close as a hundred kilometers, studying its oceans and continents, its weather systems, the patterns of its vegetation and, who knows, its city lights. Our one limitation would be the orbital inclination of the planet, which would prevent us from mapping every area on the surface, but given the benefits, this seems like a small issue. We would have achieved what Dan Goldin described.
Seth Shostak, whose ideas we looked at yesterday in the context of SETI and political will, has also recently written on what large — maybe I should say ‘extreme’ — telescopes can do for us. In Forget Space Travel: Build This Telescope, which ran in the Huffington Post, Shostak talks about a telescope that could map exoplanets with the same kind of detail you get with Google Earth. To study planets within 100 light years, the instrument would require capabilities that outstrip those of Cash’s cluster of interferometrically communicating space telescopes:
At 100 light-years, something the size of a Honda Accord — which I propose as a standard imaging test object — subtends an angle of a half-trillionth of a second of arc. In case that number doesn’t speak to you, it’s roughly the apparent size of a cell nucleus on Pluto, as viewed from Earth.
You will not be stunned to hear that resolving something that minuscule requires a telescope with a honking size. At ordinary optical wavelengths, “honking” works out to a mirror 100 million miles across. You could nicely fit a reflector that large between the orbits of Mercury and Mars. Big, yes, but it would permit you to examine exoplanets in incredible detail.
Or, of course, you can do what Shostak is really getting at, which is to use interferometry to pool data from thousands of small mirrors in space spread out over 100 million miles, an array of the sort we are already building for radio observations and learning how to improve for optical and infrared work on Earth. Shostak discusses a system like this, which again is conceivable within the time-frame we are talking about for developing an actual interstellar probe, as a way to vanquish what he calls ‘the tyranny of distance.’ And, he adds, ‘You can forget deep space probes.’
I doubt we would do that, however, because we can hope that among the many worlds such a space-based array would reveal to us would be some that fire our imaginations and demand much closer study. The impulse to send robotic if not human crews will doubtless be fired by many of the exotic scenes we will observe. I wouldn’t consider this mammoth space array our only way of interacting with the galaxy, then, but an indispensable adjunct to our expansion into it.
Of course Shostak takes the long, sensor derived view of exploring the Universe, his life’s work is radio telescopes.
Gilster is correct that interferometry will be an adjunct to sending robotic probes to distant interstellar worlds, you can’t make money by just gawking at places.
Or can you?
I discovered Karl Schroeder’s work when I was researching brown dwarfs some years ago. Who knew that somebody was writing novels about civilizations around these dim objects? Permanence (Tor, 2003) was a real eye-opener, as were the deep-space cultures it described. Schroeder hooked me again with his latest book — he’s dealing with a preoccupation of mine, a human presence in the deep space regions between ourselves and the nearest stars, where resources are abundant and dark worlds move far from any sun. How to maintain such a society and allow it to grow into something like an empire? Karl explains the mechanism below. Science fiction fans, of which there are many on Centauri Dreams, will know Karl as the author of many other novels, including Ventus (2000), Lady of Mazes (2005) and Sun of Suns (2006).
by Karl Schroeder
My newest science fiction novel, Lockstep, has just finished its serialization in Analogmagazine, and Tor Books will have it on the bookshelves March 24. Reactions have been pretty favourable—except that I’ve managed to offend a small but vocal group of my readers. It seems that some people are outraged that I’ve written an SF story in which faster than light travel is impossible.
I did write Lockstep because I understood that it’s not actual starflight that interests most people—it’s the romance of a Star Trek or Star Wars-type interstellar civilization they want. Not the reality, but the fantasy. Even so, I misjudged the, well, the fervor with which some people cling to the belief that the lightspeed limit will just somehow, magically and handwavingly, get engineered around.
This is ironic, because the whole point of Lockstep was to find a way to have that Star Wars-like interstellar civilization in reality and not just fantasy. As an artist, I’m familiar with the power of creative constraint to generate ideas, and for Lockstep I put two constraints on myself: 1) No FTL or unknown science would be allowed in the novel. 2) The novel would contain a full-blown interstellar civilization exactly like those you find in books with FTL.
Creativity under constraint is the best kind of creativity; it’s the kind that really may take us to the stars someday. In this case, by placing such mutually contradictory — even impossible — restrictions on myself, I was forced into a solution that, in hindsight, is obvious. It is simply this: everyone I know of who has thought about interstellar civilization has thought that the big problem to be solved is the problem of speed. The issue, though (as opposed to the problem), is how to travel to an interstellar destination, spend some time there, and return to the same home you left. Near-c travel solves this problem for you, but not for those you left at home. FTL solves the problem for both you and home, but with the caveat that it’s impossible. (Okay, okay, for the outraged among you: as far as we know. To put it more exactly, we can’t prove that FTL is impossible any more than we can prove that Santa Claus doesn’t exist. I’ll concede that.)
Read the rest here…
History’s H2 channel release of “Hangar 1: The UFO Files” February 28, 2014, inspired at least one viewer to file a UFO report with the Mutual UFO Network (MUFON), according to testimony in Case 54384 from the MUFON witness reporting database.
The witness had a UFO encounter about 10 a.m. on July 10, 2012, but had kept details of the incident to himself until a few scenes in the “Hangar 1” show depicted objects that resembled his original sighting. The “Hangar 1” episodes are based on MUFON case files and the first episode was televised just last evening.
The National UFO ALERT Rating System has been updated for March 2014, with California, Florida, Texas, and New York moving to a UFO Alert 3 as the highest reporting states with 25 or more cases during the month of February 2014, filed with the Mutual UFO Network (MUFON).
California was the leading high-reporting state in February with 59 cases, down from 102 January cases. Those states in a UFO Alert 4 category with 13 or more reports include: Arizona, Pennsylvania, Michigan, Washington, Georgia, and New Jersey.
From the article:
The commercial spaceflight company Golden Spike – which aims fly private missions to the moon by 2020 – has teamed up with the New York-based firm Honeybee Robotics to design robotic rovers for the planned lunar expeditions.
“We’re very proud to be working with Honeybee, which has tremendous experience and a record of successful performance in the development of flight systems for NASA,” Golden Spike President and CEO Alan Stern said in a statement last month.
Golden Spike first announced its goal of launching two-person commercial flights to the moon in December 2012. To boost the scientific output of the expeditions, the company plans to send unmanned rovers to the moon ahead of the crew to collect samples from a wider area than the crew will be able to travel from their landing pad. The rovers will then meet up with the crew’s spacecraft once it arrives, according to the mission plan. [Golden Spike’s Private Moon Mission Plan in Pictures]
“Honeybee brings a unique body of knowledge and skills to help us augment the capabilities of human exploration missions with advanced robotics,” Clive Neal, a researcher at the University of Notre Dame in Indiana and chair of Golden Spike’s lunar science advisory board, said in a statement. “Their participation is a key step forward in helping Golden Spike change the paradigm of human space exploration, through the development of highly capable lunar exploration system architecture for customers around the world.”
Honeybee Robotics has been designing planetary sampling devices for clients including NASA and the US Department of Defense for more than 25 years, and has contributed to the last three of NASA’s Mars landers: The company designed the rock abrasion tool for NASA’s Mars Exploration Rovers Spirit and Opportunity, as well as the icy soil acquisition device (or “Phoenix Scoop”) for the U.S. space agency’s Phoenix Mars lander, and the sample manipulation system and dust removal tool for the Curiosity rover.
Golden Spike officials initially priced the missions at $1.5 billion per person, but has since estimated that the cost could drop down to about $750 million with the help of media coverage and sales of merchandising rights of the missions, Stern told reporters last year at the 29th National Space Symposium in Colorado Spring, Colo. Potential moon flyers include leaders of nations, large corporations, and independently funded individuals.
The companies plan to complete preliminary tests of their rover design by mid-2014.
The cost of the landers and other equipment were the long poles in the tent of NASA’s old Constellation program.
It will be interesting to see if Golden Spike’s plan will work to bring these expenses down. I surely hope so.