722 reputation
312
bio website keith-s-thompson.github.com
location San Diego, CA
age 55
visits member for 1 year, 2 months
seen 5 hours ago

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


10h
comment What is the orbit of Earth around the Sun?
Hmm. We're currently close to perihelion (which will be on Jan 4), and the Sun is in or near Sagittarius, which is in the direction of the galactic core. So the second focus of the Earth's orbit around the sun is in the direction of the galactic core. I believe this is purely coincidental. Can you demonstrate that it's not? (The same effect should apply to the other planets.)
10h
comment What is the orbit of Earth around the Sun?
I suggest you calculate (an order-of-magnitude estimate should suffice) the gravitational influence on Earth of the galactic core relative to the influence of the Sun. I think you'll find that the galactic core's influence is negligible compared to the Sun, or even to the other planets. Earth's orbit could be elliptical rather than circular even in the absence of any bodies other than the Earth and the Sun; external influences aren't necessary to explain the eccentricity. -1. (And your link says nothing about the influence of the Milky Way.)
Dec
12
answered Why isn't the star that created the black hole a black hole?
Dec
10
comment Do Pluto and Charon have unusual Langrange points?
Quibble: 25 times as massive, not more massive.
Dec
9
comment Lack of contact with Aliens
I wouldn't say the question is "incorrect". It's entirely possible that one of the three options listed in the question is the correct answer. The problem is that we simply don't have enough information to answer it.
Dec
8
comment Lack of contact with Aliens
I seriously doubt that anyone can answer this. Nobody knows.
Dec
3
comment Have we detected galaxies which have red-shifted beyond the visible light range?
If the visible light they emit is shifted into the infrared, then any UV they emit will be shifted into the visible.
Dec
2
comment Why does the distance between Sun and Earth stay the same?
"... and obviously Earth should fall into the Sun ..." -- What exactly is your basis for that? It's not at all obvious to me. I also have no idea why you think that the lack of friction implies that a freely falling object should not reach the Earth. A freely falling object may or may not reach the Earth, depending on its velocity (remember that velocity includes direction).
Dec
1
comment What are the last images from the Galileo orbiter before impacting Jupiter?
Galileo's data rate was reduced considerably by the failure of its main antenna to deploy. en.wikipedia.org/wiki/…
Dec
1
comment Why isn't the moon dark in a solar eclipse?
@user1477388: What Mark Bailey said about the word "astrological", but to answer your question I think the word "hidden" covers what you're describing.
Nov
26
comment Planets and Pluto? Neptune?
The cultural definition of "planet" has changed before. If you want to keep the number of planets at 9, how do you justify saying Pluto is a planet and Eris isn't? If a dozen Kuiper Belt objects had been discovered in the 1930s, we probably wouldn't be having this debate (though we might well be having a different one).
Nov
25
comment can we see all binary stars as pairs?
According to Wikipedia, pairs of stars that appear close together in the sky but are not gravitationally bound are called "optical doubles". The two stars might be many light-years from each other but happen, by coincidence, to be on nearly the same line of sight as seen from Earth.
Nov
10
revised How is the universe bordered?
Spelling, grammar
Nov
10
suggested approved edit on How is the universe bordered?
Oct
31
comment Could we fly/drive through Jupiter?
@Scottie: Yes, given technology sufficiently advanced to fly through Jupiter, we could fly through Jupiter. (Borrowing from science fiction, the Enterprise couldn't do it.)
Oct
31
revised Could we fly/drive through Jupiter?
Spelling, grammar
Oct
30
suggested approved edit on Could we fly/drive through Jupiter?
Oct
29
comment Could we fly/drive through Jupiter?
In 2003, the Galileo probe was deliberately crashed into Jupiter's atmosphere. As expected, it did not survive.
Oct
28
comment How can we tell if the asteroid 2013 TV135 will hit Earth in 2032?
According to Wikipedia, it was removed from the JPL Sentry Risk Table on November 8, 2013. The latest estimate is that it will miss Earth by 0.76 AU (114 million km). Incidentally its estimated diameter is 450 meters, so the illustration is highly exaggerated.
Oct
28
awarded  Enlightened