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Astronomy & Astrophysics

- Celestial objects, space, and the physical universe as a whole.
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Jan16-12 Greg Bernhardt
aandc, library, reference Sticky Thread Pinned: A&C reference library ( 1 2 3 ... Last)
Use this topic to post links to helpful/informative websites about astronomy & cosmology.
Jul3-14 06:29 PM
140 115,319
Hellfire requested that I post a list of classic papers that one could use for reference when trying to understand the...
Nov28-12 01:12 AM
17 45,743
I'm working on a video game set in space, and I'd like my portrayal of the galaxy to be as scientifically accurate as...
May16-13 01:47 PM
6 964
Have a homework question about power law density distributions that I could use a little help on... Given a...
May17-13 04:51 PM
3 933
I have watched the Sun's shadow make its trek from the solstice moments for many years. I have it marked and like to...
May16-13 08:50 PM
8 1,688
As the expansion of space accelerates, space is created and this seems to break the conservation of energy law. I've...
May12-13 11:50 AM
2 1,482
Hello Dark matter is presumed.... to balance the sums... as visible matter doesn't work out (apparently) to a high...
May19-13 12:35 PM
9 1,306
Hello hope someone can help me to understand more about what I need to study at uni to become an astronomer. Is it...
May22-13 08:36 AM
2 1,621
hi guys, i have an elementary question about the blackhole..recently i have read in a science magazine that even the...
May15-13 03:12 AM
3 897
For a simple starter, I'm curious what the transparency of pane glass is. Moreover, we have a domed observatory...
May14-13 01:24 PM
3 1,451
I was watching a popular TV series on the Universe which briefly described super novae. Here are two naive...
May13-13 07:03 PM
5 1,068
Why do we talk about dark matter rather than dark mass? Where does the necessity for matter stem from?
May18-13 02:43 AM
15 1,462
I'm sorry if I posted this is the wrong section, but I was wondering if fundamental forces evolve? In other words, can...
May17-13 09:14 AM
2 1,194
This article made me wonder - how many people would go to Mars if it was a one-way trip? One-Way Martian Colonization...
May20-13 08:13 AM
72 13,944
Hi, I'm a total amateur, but I'm really curious about this. When we look at a galaxy that's millions of light years...
May4-13 04:29 PM
7 2,303
I have a question regarding the Eddington limit. My question is, an object with any mass has luminosity greater than...
May16-13 10:58 AM
1 1,650
can someone help me - i am new to forum. i do not have a physics background - medical doctor. i have been looking on...
May9-13 02:51 AM
29 2,634
What makes the world spin?
May18-13 12:02 PM
12 2,895
So I've been playing with a little N-body code in 3D for gravitational problems and have made an OpenGL visualization...
May17-13 12:17 AM
4 1,073
In high school whenever i asked questions about planets and their orbits around their star or the orbits of satellites...
May17-13 06:59 AM
6 1,813
Hello, I was wondering a thing or two about black holes, now I'm not any kind of physicist or hobby astronomer for...
May3-13 06:00 PM
5 1,134
I've seen many examples that an observer witnessing an object approach the event horizon will see it slow down to a...
May17-13 05:52 AM
15 1,841
I heard recently that the ecliptic is about 60 degrees out of alignment with the galactic plane, and was tilted up in...
May6-13 06:09 PM
4 2,249
Hello everyone! Just something I was thinking about today that I haven't been able to shake. I recently read that...
May5-13 08:52 PM
1 946
I hear that black holes evaporate, but does it all get converted into Hawkins radiation? And what role do white holes...
May6-13 01:44 PM
Geordie Ross
4 992
Hi, I've been messing with the found-on-web formula LST = 100.46 + 0.985647 * days past J2000 + degrees longitude +...
May7-13 08:23 PM
13 1,659
by the time light from a distant star reaches us, lets say from Canopus, does the light become coherent? and if it...
May10-13 10:17 PM
8 1,593
hello I amm trying to understand the difference between flux and specific intensity of radiation. I understand...
May7-13 04:30 PM
2 959
If the universe is expanding at less than the speed of light, what happens to EM radiation that is emitted from...
May11-13 03:01 AM
14 1,482
We know that there exists no such thing as a "rigid" substance in relativity. Now suppose we had a disc of uniform...
May8-13 06:16 PM
Vanadium 50
4 2,071
Hi, I am a Mechanical engineer from India. I want to do my Masters and Phd. in Astrophysics or cosmology.Can anyone...
May8-13 06:15 AM
0 1,299
I want to know why everything in the universe forms a Ball or Sphere? Is gravity the cause of this? If so why? For...
May12-13 06:44 PM
6 2,407
I want to know what is the shape of a Black Hole? Is it round like a globe, or is it flat or oval shaped?
May12-13 06:15 AM
3 1,928
"...... the first direct evidence of pear shaped nuclei in exotic atoms. The findings could advance the search for a...
May9-13 11:21 AM
1 806
I see there have been many postings about this topic in this forum. The formula for this relation is Luminosity =...
May14-13 06:06 AM
4 1,244
A meteorite crashed into the moon on March 17, ...
May20-13 09:45 PM
4 1,532
The Moon is close enough to Earth that it is tidally locked, however it is also slowly but steadily moving into a...
May20-13 03:34 PM
2 1,617
Hey I'm 16 and currently studying my last year of physics in high school. I have to write an extended research task...
May20-13 06:22 PM
6 1,160
I have been fascinated by stars and Black holes for most of my life but one of the things I cant get a satisfactory...
May21-13 07:21 AM
5 2,522
Hi, new and pondering with much ignorance. Hence the question marks. Had to register! Are we traveling, is our...
May21-13 11:54 AM
8 1,405
I was thinking about the big bang, the universe and thermodynamics, and it led me to the following question. What...
May21-13 03:21 PM
26 2,739 What the??? I nominate this for the most outlandish arxiv article I've seen yet...
May22-13 11:44 PM
6 1,495

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