some stuff I need to do in zero-g

Wednesday, 20 May 2009
  • Point to the enemy’s gate
  • Somersault
  • Bring some space Legos to float around in front of me
  • Bring a Nalgene of water and turn it upside-down

past v present in US space

Tuesday, 5 May 2009

Ranges depend on whether you measure from the first or last flight of a program that was active over some time period.

Past achievements in space exploration:

  • First US satellite in orbit to first man in space: 3 years
  • First US satellite in orbit to first man in orbit: 4 years
  • First man in orbit to first Moon landing: 8 years
  • Moon landings to LEO space station: 1-4 years
  • Moon landings to LEO Space Shuttle: 9-11 years
  • Pioneer 10 to Voyager 1 and 2: 5 years

Current vision of space exploration:

  • First LEO Space Shuttle to LEO space station completion: 19 years
  • From LEO Space Shuttle to Moon landing: 10-29 years
  • From LEO Space Shuttle to Mars landing: 17-36+ years
  • Cassini to Europa Jupiter System Mission: ~10 years

Where did the ambition go?! Maybe I will help re-inject some this summer.

Dear BSG: usually you have a lot of realism, but

Friday, 13 March 2009
  • naked
  • singularities
  • can
  • not
  • exist.

a subset of stuff George Will does not understand about science

Tuesday, 27 January 2009
  • An average alone is not sufficient to quantify a statistical distribution.
  • Two points are not, in general, sufficient to characterize a trend.
  • Fluctuation and variation in a dataset is normal and should be expected.
  • Experimentally, a single counterexample is not sufficient to invalidate a hypothesis.
  • Repeatable counterexamples, however, are.
  • Data showing temporal variation on two dramatically different timescales indicate that two different processes influence the data.

ways I have seen vectors denoted in papers and books since coming to grad school

Wednesday, 7 January 2009
  • italic
  • bold italic
  • italic with over-arrow
  • italic with under-arrow
  • italic with over-harpoon
  • italic with overbar
  • italic with underbar
  • italic with under-tilde

Potential reasons why humans might be viewed as the pinnacle of evolution on Earth

Monday, 22 December 2008
  1. Humans can now affect their own evolution.
  2.  Humans can now affect the evolution of other species in a controlled manner.
  3.  Humans can affect the evolution of the planet.

Some things that life apparently does not need

Friday, 17 October 2008
  1. Oxygen
  2. Sunlight
  3. Fixed nitrogen
  4. Organic molecules

Hellooooooo, life in space!