NASA has released an Asteroid Initiative Request for Information on the issue of asteroid retrieval. It's an interesting document both in its audience -- the agency is making a point about soliciting comments not only from academics, scientists and engineers but the general public -- but also because of the issues it explores. Being sought are ideas on how best to capture an asteroid, land an astronaut on one, and change its orbit, not necessarily in that order. The Los Angeles Times quotes NASA associate director Robert Lightfoot on the public component of NASA's initiative: "Too often, by the time we present a mission to the public, it has already been baked, and there's not much we can change. This is your chance to present your ideas to us before the mission is baked." If you're interested in contributing, move quickly, for the deadline for responses is July 18, with a workshop to follow in September. The creation of a Solar System-wide infrastructure will necessarily precede any...

The star Gliese 667C is as intriguing as it is because it underlines in triplicate the 'habitability' question, which surfaces every time a planet is discovered in a zone around its star where liquid water could exist on the surface. This is the classic definition of 'habitable zone,' meaning not so much a place where humans could live -- we have no knowledge of other conditions on these worlds, knowing little more than their minimum mass -- but a place where a basic condition for life as we know it is possible. I'm much in favor of considering exotic environments for life, and these would include venues ranging from the upper clouds of Venus to the depths of the icy gas giant satellites in our own system. But when we read about 'habitable zones' in most scientific papers, we're usually falling back on the liquid water criterion because it's hard enough to search for any kind of life on a distant world, much less a kind that we don't even know exists. Liquid water is a starting...

What does it take to conceive a new vision of the future and drive the idea forward? Keith Cooper, editor of Astronomy Now as well as Principium, the journal of the Institute for Interstellar Studies, examines the question in the context of a new book. Grand ideas aren't enough, for the commitment to build community and expand the audience for a breakthrough are the necessary foundation. What Gerard O'Neill and Eric Drexler can teach us about this and how their example may inform the future choices of the interstellar movement are at the heart of Keith's review. Along the way come many questions, especially this: Is a 'failure of nerve to play the long game' what is holding us back as we contemplate a future among the stars? by Keith Cooper In 1972, a think-tank of businessmen, politicians, economists, scientists and bureaucrats going by the name 'The Club of Rome' (they held their first meeting in the Italian capital in 1968) painted a picture of a dystopian future where by the year...

There was a time when people collected old photographs in drawers and photo albums, a time before the digital age when you wasted three or four shots getting just the one you wanted, and the perishability of film was born home every time you saw colors fading on an old image. Yesterday I browsed through black and white snapshots of family members long gone, pictures taken in the 1920s and 1930s, and thought about how we try to preserve memory by framing a moment. Then I thought about how July 19, 2013 was itself going to be preserved, a celestial alignment snatched from time as seen from deep in the Solar System. Carolyn Porco, who serves as imaging team leader for the Cassini Saturn orbiter, calls July 19 'a day for all the world to celebrate.' Cassini will look back at our planet and snap our picture in natural color next to the fabulous system of rings and moons it's been showing us all along. Thus a pixel from Cassini's 1.44 billion kilometers will become an opportunity for...

Adam Crowl concludes his discussion of the recent Starship Century conference in San Diego. Videos from the session are now becoming available online. by Adam Crowl Lunch at the Starship Century Symposium was provided by UCSD, allowing attendees to remain nearby, adding to the discussion and trading of ideas and concerns. Certainly I appreciated the chance to catch up with friends and faces from the other side of the Pacific, as well as meeting new people. Having read people's novels, books or scientific papers for years, then meeting them on Facebook or email, I felt like I knew some of them already. Meeting authors that I had grown up with like Larry Niven, Joe Haldeman or David Brin was something I was getting used to, as I was more eager to discuss their interstellar ideas than succumb to fan-shock. I finally had my ideas about Larry Niven's fusion-shield, from his "Known Space" stories, confirmed by the source, but didn't quite get to talk to David Brin about the Fermi Paradox...

We're fortunate to have had Centauri Dreams regular Adam Crowl not just as an attendee but a speaker at the recent Starship Century symposium in San Diego. Here Adam, in the first of a two-part report, gives us a look at the speakers and their ideas. With regards to comments, please note: In the last week we've had a lengthy discussion of inclusivity in the space community that has absorbed two comment threads. Anyone who wants to continue that discussion can do so in our Facebook group. On this site we need to get back on topic, in this case, the ideas on interstellar flight presented at this conference and where they take us. by Adam Crowl The Starship is still about 100 years away, but we will begin building it this century. This was the message that Gregory Benford and his mirror-twin, James Benford, were proclaiming together in San Diego, with the help of notables of both science and science fiction. And me. Just how I got involved is another story. Suffice it to say that I know...

Congratulations to Icarus Interstellar, which with five days to go has easily surpassed its goal of raising $10,000 on Kickstarter. The campaign supports the Starship Congress to be held in Dallas August 15-18 at the Anatole Hilton Conference Center. It is described on the Kickstarter page as "...a forum where scientists, physicists, engineers, researchers, urban designers, representatives from international space programs and present-day commercial space operators, as well as popular and well-known interstellar speakers and space journalists share their visions for how the future of spaceflight and interstellar exploration is to unfold." The Kickstarter description also includes a quick refresher on Project Icarus itself, the main goals of which are: To design a credible interstellar probe that is a concept design for a potential mission this century; To allow a direct technology comparison with Daedalus and provide an assesment of the maturity of fusion-based space propulsion for...

The all too early death of Iain Banks conjures up so many images from his books that I can't begin to list them all here. Grant his sly word-play, his wit, his deft management of character and you're still left with a sense of gratitude for the sheer poetry of his landscapes. In Look to Windward, a character named Kabe walks the streets of blacked out city, down along a dark canal whose quayside is softened by snow. Then he looks up and the universe rotates: The snow was easing now. Spinwards, over the city center and the still more distant mountains, the clouds were parting, revealing a few of the brighter stars as the weather system cleared. A thin, dimly glowing line directly above -- coming and going as the clouds moved slowly overhead -- was far-side light. No aircraft or ships that he could see. Even the birds of the air seemed to have stayed in their roosts. Spinwards... We're on one of Banks' 'orbitals,' space habitats formed as enormous rings millions of kilometers in...

Stephen Ashworth's April essay at Astronautical Evolution deals with a question of considerable scientific interest: When will Voyager 1 leave the Solar System? But writer, researcher and jazz saxophonist Ashworth also has a philosophical streak, writing articles so far this year on the prospects for a technological singularity, the role of space in a society threatened with ecological disruption, and the business model best suited for manned spaceflight. In this essay, Stephen brings us a report from a recent seminar that mixes philosophy and starships, with consequential questions about autonomous technology, the role of discovery in combating intellectual stagnation, and the geopolitics of deep space exploration. by Stephen Ashworth The Institute for Interstellar Studies plans to run a symposium annually at the British Interplanetary Society's headquarters in London. The first of these events took place on 29 May, dedicated to the philosophy of the starship, and was organized by...