Icarus Interstellar Starship Congress Day 2
16 August 2013
Day 2 – Interstellar This Lifetime (20 – 50 years) | Friday August 16th, 2013
Today I was present for the whole of Day 2 of the Icarus Interstellar Starship Congress, which included by own stint of giving a co-presentation with Heath Rezabek on “Existential Risk for Interstellar Advocates.”
The day began with Michael Minovitch giving an updated perspective on the Bussard ramjet, which by his calculations could obtain 0.7 G acceleration, which puts it in the class of what I have elsewhere called the “game changer” of a 1 G starship. A 1 G starship would allow human beings to travel very long distances within the cosmos in ordinary life spans, which is a point that Carl Sagan also made in his Cosmos television series. Moreover, Mr. Minovitch was quite serious about the possibility of building a Bussard ramjet with contemporary technology, or what we might call nearly contemproary technology. He even suggested that the space shuttle could be take out of math balls to ferry the required parts into orbit for building a Bussard ramjet in the near future.
Many of the day’s talks involved ongoing work on familiar starship designs. It might sound a bit odd that I should say, “familiar starship designs,” because we haven’t yet built any starships, but anyone familiar with the literature can name off a short list of designs that have currency in the community of those who think about such things. For example, Srikanth Reddy gave a detailed structural analysis of the Daedalus starship design, while Friedwardt Winterberg gave a review of several different familiar starship designs, as did Kelvin Long in his talk, “Rise of the Starships.” Winterberg presented one idea that was unfamiliar to me, which was a way to approach the problem of collisions of a starship with micrometeorites, which would impact with devastating force at relativistic velocities. Winterberg suggested that a matter-anti-matter drive could be occasionally turned around and blasted forward to clear a trail for the starship.
Winterberg prefaced his talk with a wonderful quote from Wernher von Braun:
“The importance of the space program is to build a bridge to the stars, so that when the Sun dies, humanity will not die. The Sun is a star that’s burning up, and when it finally burns up, there will be no Earth… no Mars… no Jupiter.”
This is, of course, the essence of existential risk consciousness, and I think that many of those involved with spaceflight are involved because they see the crucial role that spaceflight plays in existential risk mitigation, even if they have never heard the term, “existential risk.” My co-presentation with Heath Rezabek was focused on existential Risk. Heath started with the outline of the idea and some of his proposals, and I followed with a sketch a existential risk in the context of a growing interstellar civilization.
There were many excellent presentations among the above that I have not mentioned here: Robert Freeland on the use of a magsail to slow down a starship, Gwyn Rosaire on nuclear rockets, who clearly presented nuclear rocket technology as part of a developmental process of starship drives, and Armen Papazian on post-scarcity economics for the space age.
The most widely-ranging talk was that of Georgio Gaviraghi on “A Kardashev III Approach to Extra-Solar Colonization.” Gaviraghi gave his own interpretation of Kardeshev which seems to have become commonplace, but he went much further, speaking of singularities in the plural and suggesting that exponential technological growth may result in a K2 and oK3 civilization much earlier than we usually suppose.
After the individual talks there was a panel discussion during which three questions were asked, the panel discussed them, and audience members commented on them. The questions where whether human beings should wait to go to the stars until we have “fixed” things on earth, whether interstellar exploration should be by AI or should be a strictly human undertaking, and whether some policy needs to be adopted in light of the possibility of encountering alien forms of life. These questions generated a lot of interesting comments.
The discussion of the last of the three questions ranged widely over proposed rules for contact with alien life and the unlikelihood that any policy would be impossible to enforce. Kevin Long asked, “Who speaks for alien life?” Several people suggested that if we encounter alien life we should sample it and leave it alone. Someone asked the equivalent of whether human beings want to be an invasive species. Joe Ritter implied his sympathy for directed panspermia. Many seemed to suggest something like the precautionary principle in any exchanges with alien life, and that we should never bring it back to Earth.
My co-presenter, Heath Rezabek, stood up and gave his perspective on this debate, which I thought was quite interesting. Heath suggested that after human beings have spent some time traveling around the cosmos, and had seen a great many barren rocks, that if, after this, we were to find another beautiful blue-green planet like our own, covered in complex life, by that time we may have realized that such things are rare and ought to be treated with respect. I think there is a lot of merit in this observation, and it also incorporates a developmental perspective on human engagement with the cosmos. While we may not learn out lessons reliably, we do sometimes learn our lessons, so that the possibility can’t simply be dismissed.
There is more to say, and I took lots of notes, but I am tired now and must content myself for the moment with this inadequate sketch of the day.
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Here is the complete program of today’s events:
8:45am Introduction to Day 2
9:00am Keynote: Michael Minovitch, “Interstellar Space Travel with Reasonable Round-trip Travel Times”
9:45am Presentation 1: Jason Cassibry, “Vehicle Requirements for an Alpha Centauri Flyby in 50 Years”
10:10am Presentation 2: Srikanth Reddy, “Structural Analysis of the Daedalus Reaction Chamber & Thrust Structure”
10:45am Presentation 4: F. Winterberg, “Cheating the Death of the Sun by Relativistic Interstellar Spaceflight”
11:30am Presentation 3: Robert Freeland, “Trading a Mag-Sail vs. Fusion for Full Deceleration”
11:55am Presentation 6: Gwyn Rosaire, “The Nuclear Thermal Rocket’s Role in Promoting Interstellar Exploration”
1:15pm Keynote: Kelvin Long, “Rise of the Starships”
2:00pm Presentation 7: Armen Papazian, “Money Mechanics for Space”
2:25pm Presentation 8: Chris Wimer, “Using Game Mechanics to Increase Funding and Improve Public Knowledge”
3:00pm Presentation 9: Heath Rezabek & Nick Nielsen, “(Xrisk 101) Existential Risk for Interstellar Advocates”
3:25pm Presentation 10: A. Caminoa & G. Gaviraghi, “Critical Path and Interstellar Routes”
3:50pm Presentation 11: A. Caminoa & G. Gaviraghi, “A Kardashev III Approach to Extra-Solar Colonization”
4:15pm Break | Description of Evening Event
4:30pm STARSHIP CONGRESS: Mid-Term Questions
6:00pm Dinner (Individual)
8:00pm Event 2 | “Starship Congress Cocktail Evening with Sarah Jane Pell”
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