5,276 reputation
1329
bio website keith-s-thompson.github.com
location San Diego, CA
age 54
visits member for 2 years, 9 months
seen Jul 26 at 1:49

I'm a programmer and all-around nerd living in San Diego, California and working at JetHead Development Inc.

E-mail: Keith.S.Thompson@gmail.com


Oct
28
answered If nothing in the universe can travel faster than light, how come light can't escape a black hole?
Oct
26
comment Dropping an object on the moon
And even if that weren't true (if the Moon were somehow stationary at the same distance from the Earth), the Moon's gravity would still be orders of magnitude stronger than the Earth's gravity.
Oct
25
revised Dropping an object on the moon
Add link to hammer-and-feature video
Oct
25
revised Could someone jump from the international space station and live?
MOOSE
Oct
25
awarded  Nice Answer
Oct
23
revised Could someone jump from the international space station and live?
Sorry, forgot about the Vostok capsule
Oct
20
comment Would two astronauts one in a satellite, one on top of a tower have the same experience?
Even if you're standing on the ground at sea level at the equator, your weight is slightly reduced by the rotation of the Earth. On a stationary tower at geosynchronous height, that effect would completely cancel out the force of gravity.
Oct
16
comment How does gravity work?
"How does gravity work?" "Fine, thanks!"
Oct
16
comment Could someone jump from the international space station and live?
@MathewFoscarini: I wasn't asking about the ISS vs. another orbiting object; I was asking about the ISS vs. a stationary platform. Of course no such platform currently exists.
Oct
16
comment Could someone jump from the international space station and live?
Is the question about jumping from the altitude of the ISS, about 400 km, starting at zero ground-relative velocity (say, jumping off a space elevator), or jumping from the ISS itself? The former gives you less velocity to kill, but also less atmosphere to use for braking; the latter gives you a shallow re-entry angle. I don't know which would be easier. Ignoring air resistance, a straight fall from 400 km would take about 5 minutes, with an impact speed of 2800 meters/sec -- much less that the station's orbital speed of 7700 meters/sec.
Oct
15
answered Could someone jump from the international space station and live?
Oct
12
awarded  Yearling
Oct
6
comment In a very small static universe with only a particle, does it make sense to talk about time?
Can the particle talk? 8-)}
Oct
2
revised What would it be like if we had a planet very close to us?
added 4 characters in body
Oct
2
comment Where on Earth can you find plasma?
Not the blood bank (unless they happen to have a neon sign).
Oct
1
comment Theoretically, can a black hole collapse until it gets smaller than its Schwarzschild radius?
I see someone recently downvoted this answer. I don't doubt that it was deserved, but an explanation would be helpful to everyone.
Sep
28
comment Age of the Earth and the star that preceded the Sun
That assumes that there was one such star, something that's not at all obvious.
Sep
28
comment Age of the Earth and the star that preceded the Sun
In what sense is it "unheralded"?
Sep
26
comment Magnitude of New Comet C/2012 S1 (ISON)
This doesn't answer your question about dust and ice, but here's an article about it in Astronomy Now. It suggests that it might reach a magnitude of -16; compare that to -12.92, the maximum brightness of the full Moon. (As with Kohoutek, prepare to be disappointed.)
Sep
23
answered Is it possible to hear the past?