5,286 reputation
1329
bio website keith-s-thompson.github.com
location San Diego, CA
age 55
visits member for 2 years, 11 months
seen Aug 25 at 22:20

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

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


Oct
30
comment Why does an octave on a piano have the divisions of 8 white keys and 5 black keys?
Thanks for the detailed clarification.
Oct
30
awarded  Teacher
Oct
29
answered Why does an octave on a piano have the divisions of 8 white keys and 5 black keys?
Oct
28
comment Does $E$ really equal $mc^2$?
Doesn't $E = m c^2$ still apply if $m$ is taken to be the relativistic mass (which increases with increasing speed)?
Oct
28
comment How does the view of night sky change as the Sun orbits around the Milky Way?
Note that some of the apparent motions of the stars, particularly having to do with which star is currently the pole star, are affected by the precession of the equinoxes.
Oct
27
comment Does $E$ really equal $mc^2$?
@DavidZaslavsky: Then perhaps this is a good chance for them to learn. (I've updated the answer for, I hope, better clarity.)
Oct
27
awarded  Editor
Oct
27
revised Does $E$ really equal $mc^2$?
Clarification
Oct
27
comment Does $E$ really equal $mc^2$?
I was referring to the meaning of if-then in logic. See here.
Oct
26
answered Does $E$ really equal $mc^2$?
Oct
26
answered Why is this radio telescope's reflector spherical and not parabolic?
Oct
17
comment Is dark matter around the Milky Way spread in a spiral shape (or, in a different shape)?
Does that mean that spiral galaxies are disk shaped (as opposed to spherical) because of non-gravitational interactions? Wouldn't a spinning mass of gas and dust form a disk even without self-interaction?
Oct
17
comment Is dark matter around the Milky Way spread in a spiral shape (or, in a different shape)?
Wild guess: Probably not. As I understand it, the arms themselves aren't all that much denser overall than the gaps between them; they're just richer in young bright stars. I wouldn't expect the mechanism that creates and maintains the arms to affect dark matter.
Oct
17
comment Which way do spiral galaxies rotate?
@SachinShekhar: The article says "Astronomers suspect that NGC 4622 interacted with another galaxy. Its two outer arms are lopsided, meaning that something disturbed it." I can't judge whether that's accurate, but it seems plausible.
Oct
16
comment Get time from sun Azimuth
A sundial? 8-)}
Oct
16
answered Which way do spiral galaxies rotate?
Oct
12
awarded  Supporter
Oct
12
answered A mirror flips left and right, but not up and down
Oct
12
comment What is the current status of Pluto?
@CarsonMyers: It isn't, according to the link in the answer.
Oct
12
comment What is the current status of Pluto?
Is Ceres a planet in your book? What about Haumea, Makemake, and Eris? The real question is, would Pluto have been called a planet if we'd known what we know now about the bodies that exist int the Solar System?