Existential Risk and Far Future Civilization

How do we ensure the survival of our civilization over future millennia? Yesterday Heath Rezabek discussed installations called Vessels that would contain both archives and habitats to offset existential risk. Today Rezabek's collaborator, author Nick Nielsen, broadens the view with an examination of risk itself and three possible responses for protecting our culture. Nick is the author of two books, The Political Economy of Globalization (Palgrave Macmillan, 2000) and Variations on the Theme of Life (Trafford, 2007). In addition to his recent talk at Starship Congress in Dallas, he presented "The Moral Imperative of Human Spaceflight" in 2011 at the 100 Year Starship Symposium in Orlando, and "The Large Scale Structure of Spacefaring Civilization" at the 2012 100YSS conference. In addition, he authors two blogs: Grand Strategy: The View from Oregon and Grand Strategy Annex, focusing on the future of civilization and the philosophical implications of contemporary events. Mr. Nielsen...

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Deep Time: The Nature of Existential Risk

At the recent Starship Congress in Dallas, writer, librarian and futurist Heath Rezabek discussed the Vessel Archives proposal -- a strategy for sustaining and conveying Earth's cultural and biological heritage -- which was directly inspired by Gregory Benford's idea of a Library of Life. Working with author Nick Nielsen, Rezabek is concerned with existential risk -- Xrisk -- and the need to ensure the survival of our species and its creations in the event of catastrophe. Rezabek and Nielsen's presentation was the runner up for the Alpha Centauri Prize awarded at the Congress, and it was so compelling that I asked the two authors to offer a version of it on Centauri Dreams. Heath's work follows below, while we'll look at Nick's in tomorrow's post. Both writers will be returning on a regular basis for updates and further thoughts on their work. by Heath Rezabek Some challenges are too daunting to approach alone. Existential risk is certainly one; bringing a comprehensive strategy to a...

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Sun-Skimming Planets (and a Riff on Brown Dwarfs)

It's time to catch up with recent exoplanet finds out of MIT as I start weaving in recent news with conference notes and ideas from other reading. Kepler 78b is much in the news because of its orbit, which takes it around its star in a breathtaking 8.5 hours, so that you can cram almost three Kepler 78b years into a single Earth day. That means, of course, that this is a planet that all but skims its star, with an orbital radius about three times the radius of the star. In Solar System terms, we're talking about a world forty times closer to its star than Mercury is to the Sun. Image: A scorched Kepler 78b may have yet more to tell us, as the article below explains. Credit: NASA/JPL-Caltech. With temperatures somewhere between 2300 K and 3100 K on the bright side (and I would assume this is a tidally locked world), we would be looking at a veritable ocean of lava on the surface. This MIT news release points out that because the researchers were able to detect the light emitted from...

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Neil Armstrong: One Small Friendship Remembered

Neil McAleer is probably best known in these pages for his fine biography Visionary: The Odyssey of Arthur C. Clarke (Clarke Project, 2012), but this is just one of his titles. In fact, his book The Omni Space Almanac won the 1988 Robert S. Ball Award from the Aviation and Space Writers Association, and his work has appeared in magazines from Discover to the Smithsonian's Air & Space and in many newspapers. A recent note from Neil reminded me that August 25th marked one year since the death of Neil Armstrong. This reminiscence of the astronaut brings Armstrong wonderfully to mind and gives us a bit more of Clarke, leaving me to wonder only how time has gone by so quickly in the days since the death of both men. McAleer's article also gives me a chance to pause in Starship Congress coverage as I begin to collect papers from many of the presenters, the first of which we'll be looking at a bit later this week. by Neil McAleer From the great deep to the great deep he goes. -- Alfred Lord...

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Interstellar Studies in Context

With the beginning of a new week it's time to ponder how best to move forward with coverage not only of the recent Starship Congress in Dallas, but the upcoming 100 Year Starship Symposium in Houston. For that matter, I still have material from the Starship Century event in San Diego, a gathering I was unable to attend but which continues to be available online. The Starship Congress videos are also up for those who missed Dallas, and I'm going to assume the Houston conclave will likewise be recorded. Watching online can't match the interaction and conversation of being there, but getting to hear the presentations is a major plus. What I'll be doing as Houston approaches is continuing to reflect on the conferences I've attended so far this year while also trying to keep up with ongoing news. In the days since Dallas I have continued to speak with a number of presenters who will be joining us, as Charles Quarra did on Friday, with reports on their own work. Several have also agreed to...

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A Light Bridge to Nearby Stars

by Charles Quarra Charles Quarra tells me that like many kids who grow up dreaming about the stars, he realized early on that a career in physics would make sense. A book-filled childhood helped fix this focus, especially Carl Sagan's The Cosmic Connection and Peter Nicholls' The Science in Science Fiction. Charles went on to get a Physics B.Sc degree from Universidad Simón Bolivar in Caracas in 2006, but adds "pursuing it as a career turned out to be less satisfying as time went on. I've also been programming most of my life, so a transition to a software development career felt almost too natural for me, which I've been doing since moving to Panamá in early 2008." His interest in space propulsion and exploration, though, remains strong, as evidenced by the paper he presented at Starship Congress in Dallas, which looks at building a chain of stable equidistant laser relays to provide beamed power for interstellar spacecraft. In the post below, Charles summarizes what he has...

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Sailcraft: Uses of the Beam

I'm always on the lookout for practical ways to use solar sails. We think long-term here and interstellar flight is the topic, but the other side of that coin is that we need to see incremental progress made that builds toward a significant human presence in space. Creating the installations to send powerful microwave or laser beams to interstellar sailships will involve mastering all kinds of needed objectives starting with getting large payloads to low-Earth orbit cheaply and building plentiful expertise in moving supplies at interplanetary distances. Sails can go to work for us here, and before we get to that level, we can chart a path of development with clear, practical uses that companies and governments can support. Yesterday I mentioned Les Johnson's talk at Starship Congress in Dallas, in which he described ongoing sail efforts and noted that NASA's Sunjammer sail was partly sponsored by the National Oceanic and Atmospheric Administration. Early warning for solar storms is a...

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The Path to Beamed Sails

Several years ago in Italy Les Johnson told me that he had once had the coolest job description in NASA. And I remember those days in the early 2000s when I was just beginning to investigate interstellar issues, and Les, working at Marshall Space Flight Center in Huntsville, carried a NASA business card describing him as 'Manager of Interstellar Propulsion Technology Research.' These days Les' title is not quite as exotic but he's involved as ever with solar sails. Les is also an author, and among his many books is one I recommend to anyone trying to learn more about solar sails. Written with Gregory Matloff and Giovanni Vulpetti, Solar Sails: A Novel Approach to Interplanetary Travel (Copernicus, 2008) reviews the history of the concept going back to James Clerk Maxwell, who pointed out in his monumental work on electric and magnetic fields that photons can impart force to an object they encounter. Konstantin Tsiolkovsky and the Latvian scientist Friderikh Arturovich Tsander went on...

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Key Issues for Interstellar Sails

The evening after Jim Benford's Starship Congress talk on his solar sail lab work at the Jet Propulsion Laboratory, a small group of sail advocates joined him in the Hilton Anatole's top floor restaurant to talk over the issues. Benford is organizing Project Forward, named after the legendary Robert Forward, as an Icarus Interstellar effort to further refine the interstellar beamed sail concept. Asked to name the biggest problem areas for sails, the group came up with several, but at the top of the list was deceleration. How do you slow a beamed sail down when it arrives at its target? A number of possibilities suggest themselves and at this point all of them are completely theoretical. Forward himself wrote up a 'staged sail' concept, in which the outer ring of the sail detaches as the star is approached, moving ahead of the inner ring and attached payload. The Earth-based beamer bounces the laser off the larger sail ring, which reflects it back to the smaller sail and slows it for...

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The Sail Comes to Texas

Low clouds had descended upon Dallas when I landed at Love Field, and by the time I got to the Hilton Anatole for the Starship Congress being hosted by Icarus Interstellar, the city outside was swathed in mist. This was last Wednesday evening, and it was late enough by the time I had dinner that a quick stroll through the cavernous facility was about all I wanted to do before getting some sleep. The Anatole, though, was gorgeous, filled with paintings and sculpture, some of which (two statues of elephants) became helpful landmarks as I learned to navigate the place. Image: An atrium at the Hotel Anatole at night, one of two, connected so that inveterate walkers like myself could make figure-eight circuits by following the room corridors on any floor. Starship Congress was a roaring success, the kind of thing that happens when you put people with passionate interests in the same place who usually know each other only through email or by reputation. Saving the day for me on day one was...

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Starship Congress in Dallas

Starship Congress, toward which I am headed as you read this, begins on Thursday. In the nine years and counting that I've been writing Centauri Dreams, I've been happy to see how many conferences have taken to archiving or, even better, streaming their proceedings so that those who can't attend can follow along. Live streaming from Starship Congress will be available here, according to Icarus Interstellar. And if you're a Twitter person, the tag for the conference is to be #starshipcon, which should be an active place to watch. Further information here. I'm posting this automatically because today is a travel day, and another conference brings up the inevitable question about how best to cover it. I've tried every method in the book but have learned that so-called 'live blogging' just doesn't work, at least for me. I can crank out constant updates but I wind up with a muddled notion of the big picture and my notes aren't as detailed as I would like. I tried to tweet my way through...

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Earthbound Tests for Titan Lake Lander

As we saw last week, touching down on Europa is going to be a tricky maneuver, at least based on the surface mapping we have so far, where boulders show up all the way down to the limits of resolution. That's why we need better imagery from the moon, a major motivation for the proposed Europa Clipper. Titan poses far fewer problems. Its thick atmosphere allowed the Huygens probe to land softly after a long, slow descent by parachute. Proposals for Titan missions have included boats to explore its lakes (Titan Mare Explorer) and airborne laboratories to soar through its skies (AVIATR: Aerial Vehicle for In-situ and Airborne Titan Reconnaissance). The SETI Institute, working with NASA, has been testing the lake option at Laguna Negra, a lake in the Chilean Andes, in a project called Planetary Lake Lander (PLL). The idea is to develop the kind of autonomous hardware we'll need to explore Titan from the surface. But PLL is a dual-purpose mission that also studies the watershed of Chile's...

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Alpha Centauri Prize Announced

As we approach Starship Congress in Dallas, the Institute for Interstellar Studies has announced the creation of the Alpha Centauri Prize Awards, the first of which will be the 'Progenitor Award,' to be bestowed at this year's Starship Congress on August 18. The winner will receive a certificate and $500 cash award donated by Icarus Interstellar, the organization behind the Dallas meetings. The winner is to be chosen from among those presenting at the Starship Congress. The Dallas gathering that convenes this Thursday will be the third major interstellar conference so far this year, following conclaves in Huntsville (Tennessee Valley Interstellar Workshop), San Diego (Starship Century) and preceding September's 100 Year Starship Symposium. In addition, a conference on The Philosophy of the Starship was held by I4IS in London in May. In that suddenly quickened climate for interstellar studies the judges for the Alpha Centauri Prize Progenitor Award are being asked to make their...

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Landing Sites on Europa

A paper just published online by the journal Astrobiology examines what a Europa lander could accomplish on the surface. It’s part of the process of future mission building even if that future is deeply uncertain -- we’re a long way from a Europa lander, and funding even a far less demanding flyby mission is problematic in the current environment. But Robert Pappalardo, lead author of the study at JPL, explains the rationale for a close-up study of the icy world: "If one day humans send a robotic lander to the surface of Europa, we need to know what to look for and what tools it should carry. There is still a lot of preparation that is needed before we could land on Europa, but studies like these will help us focus on the technologies required to get us there, and on the data needed to help us scout out possible landing locations. Europa is the most likely place in our solar system beyond Earth to have life today, and a landed mission would be the best way to search for signs of...

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Remembering John Billingham

Michael Michaud is no stranger to these pages, with a number of prior contributions and a reputation that precedes him in the field of SETI and interstellar research at large. Among his accomplishments are a lengthy career in the U.S. Foreign Service, where he served as Counselor for Science, Technology and Environment at U.S. embassies in Paris and Tokyo, and Director of the State Department's Office of Advanced Technology. His involvement with SETI is lengthy and includes chairing working groups at the International Academy of Astronautics and numerous articles and papers. His book Contact with Alien Civilizations: Our Hopes and Fears about Encountering Extraterrestrials (Springer, 2007) is an indispensable contribution to the growing body of SETI literature. Today Michael reflects on the life of his friend and colleague John Billingham, who died on August 4 at the age of 83. by Michael Michaud One of the true pioneers of SETI has left us. John Billingham played a major role in...

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‘Graveyard Comets’ in the Asteroid Belt

When we study extrasolar planetary systems, we're seeing stars and planets in a wide variety of ages and configurations, helpful in making sense out of our own system's past. New work out of the University of Antioquia (Medellin, Colombia) suggests changes to the main belt of asteroids between Mars and Jupiter of a kind that we may one day be able to spot in the disks around stars younger than the Sun. What Ignacio Ferrin and team have found is that the main belt, already known to house more than a million objects from one meter to 950 kilometers in size, is also what their paper calls "an enormous graveyard of ancient dormant and extinct rocky comets." That conclusion emerges from a study of main belt asteroids recently discovered to have cometary characteristics (the paper calls these 'asteroidal belt comets', or ABCs). These objects sublimate ices and otherwise behave like comets even though their orbits are entirely asteroidal. The researchers believe that what we are seeing is...

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A Prize for ‘Black Sky Thinking’

If you can get your head around the idea that architecture can 'grow' by using the tools of synthetic biology and 'smart' chemistry, you'll see that what goes on inside a starship may be radically different from anything we've imagined before. Rachel Armstrong has done outstanding research in the area of sustainable solutions for both natural and engineered environments, and works daily on design issues raised by new materials. It's not surprising to find Dr. Armstrong involved with Project Persephone, the attempt by Icarus Interstellar to model environments aboard a long-duration starship that might spend centuries or more getting to its destination. Image: Sustainability savant Rachel Armstrong, whose work involves 'living architecture' that makes it possible for buildings to be constructed with some of the attributes of biological systems. Credit: Icarus Interstellar. When Richard Obousy reported in these pages last March about developments at Icarus, he noted the challenges posed...

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A Directly Imaged ‘Second Jupiter’?

On the scale of Jon Lomberg’s Galaxy Garden, discussed here on Friday, the star GJ 504 is less than an inch away, representing some 60 light years. In fact, as Jon reminds visitors to the Garden in Hawaii, almost all the stars visible to the naked eye are contained in the volume equivalent of a single leaf. When I speak about interstellar matters I always try to find comparisons that get across the scale of the galaxy, but I can’t think of a better way to experience that scale than to walk through these gorgeous grounds near Kailua-Kona. As I think about GJ 504 and the Galaxy Garden, I’m also reminded that Kona is the source of one of my favorite coffees, yet another reason for making the trip. But yesterday afternoon I roasted some excellent El Salvador beans and I’m settling in with a brightly flavored mug as I write, just the thing to kick off the week. I begin it with GJ 504 because a team from the SEEDS project (Strategic Explorations of Exoplanets and Disks with Subaru) led by...

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The Model of the Universe

The creator of the Galaxy Garden (Kona, Hawaii), Jon Lomberg is an artist working in many media whose work continues to resonate in the space community and the public at large. Centauri Dreams readers will know that he worked with Frank Drake in designing the cover for the Voyager Interstellar Record and the sequence of 120 photographs and diagrams portraying Earth and its inhabitants (soon to become the first human artwork to leave the Solar System). But they'll also remember COSMOS, the series for which Jon served as chief artist. In fact, he worked as Carl Sagan's principal artistic collaborator for many years, including key work on the film CONTACT. Here Jon extends his ideas on nature, art and astronomy to venues much larger than the Galaxy Garden itself, a proposal that would model our staggeringly beautiful cosmos. For more on the concept, be aware that Jon discussed these ideas in his talk at the recent Starship Century conference, a video of which is available. by Jon...

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Variability of Enceladus’ Plume

I've come to believe that building the system-wide infrastructure we'll eventually need for interstellar flight will depend on satisfying two imperatives: Planetary defense and astrobiology. The first demands the ability to move payloads quickly to distant targets, allowing plenty of time to change the trajectory of problematic objects. The second is all about science and answering key questions about our place in the cosmos. I know few people who think life doesn't exist elsewhere, but if it really is out there, finding and cataloguing it will involve human crews operating deep in the Solar System. After all, we're learning how widespread internal oceans may be, and it's possible that even places as remote as Triton may have spawned some kind of organisms. And while we've had our eye on Europa's hidden ocean for some time now, Enceladus is a recent entrant into the astrobiology sweepstakes with its jets of water ice and organic particles emmanating from the so-called 'tiger stripes'...

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Charter

In Centauri Dreams, Paul Gilster looks at peer-reviewed research on deep space exploration, with an eye toward interstellar possibilities. For many years this site coordinated its efforts with the Tau Zero Foundation. It now serves as an independent forum for deep space news and ideas. In the logo above, the leftmost star is Alpha Centauri, a triple system closer than any other star, and a primary target for early interstellar probes. To its right is Beta Centauri (not a part of the Alpha Centauri system), with Beta, Gamma, Delta and Epsilon Crucis, stars in the Southern Cross, visible at the far right (image courtesy of Marco Lorenzi).

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