Chris Impey, 2015, W. W. Norton, Bvtn Lib 629.4011 IMP
Prof at U. Arizona
- p55 $1 billion per launch, $80,000/kg, massive subsidies
- p95 "Musk ... built the Paypal brand and three years later sold it to eBay for $1.5B"
- contradicted by Eric M. Jackson's "The Paypal Wars"
- p100 SpaceX 3000 employees with an average age of 30 - $3.1B NASA contract
- p101 SpaceX reusable rockets - Grasshopper tests, 8 test flights. "Designed to fly to 90 km"
- first attempt at recovered Falcon - spin and crash
- when SpaceX covers its costs with satellite launches and supply runs to the Space Station, he will turn his attention to Mars.
- p204 Australia - no human speciation after 30,000 years of isolation
- p204 Our Cyborg Future - implants and body parts
- p215 Antonin Gonzales "Earth Similarity Index" - Venus is 0.78
- p221 Fusion 1e11 kg of fuel to get to Alpha Centauri in less than 1000 years
- p223 Bob Forward: 10 M GW laser onto a 1000 km sail
- p223 James Benford: Microwave sail, 2000 degrees and highly reflective
- p225 "We'd send nanobots in waves, so they could pass information back down the route of travel, like a bucket brigade at a fire."
- p225 "The difficult trick is aiming the laser at such a small target when it's far away"
Dyson Shell equivalent - circular accelerator ring and thinsats - up to 0.7C? Slower is probably better. Can a travelling thinsat slingshot around a black hole and return and slow down? The nearest observed black hole is 1600 light years away, Sagitarrius V4641. Power - a shell 100 AU in diameter, and 1 micrometer wavelength, can focus on a "spot" 200 m across 2000 light years away. Not for the impatient ...
- p238 Biologist Ernst Mayr called SETI "hopeless" and "waste of time".
- p239 Radio SETI replaced by (hypothetical) lasers ... "we may use quite different strategies and technologies 100 years from now.
Billion year civilizations will be a million times more "visible" than thousand year civilizations, and twenty million times more observable than 50 year "radio" civilizations.
p254 Researchers at Fermilab ... sifted 250,000 stars down to seventeen candidates, of which four were declared "amusing but still questionable". Ref: results quoted online at http://home.fnal.gov/~carrigan/infrared_astronomy/Fermilab_search.htm