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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
140 111,065
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 44,368
Hi I am making a solar system emulation. I need some fairly precise velocities for the planets as a start velocity...
Sep21-12 04:41 PM
4 1,742
I talked to an astronomy student recently, and he told me that if I travel out from earth in a straight line, I will...
Jan28-07 08:28 AM
12 1,787
First of all - please don't give me warnings if I write something that is not correct here. I'm just trying to...
May9-08 11:07 AM
28 4,568
Some physicists have told me that the universe is like the surface of a balloon. Does this mean that if it were...
May12-08 10:26 AM
27 3,237
Is redshift the only reason? And why cannot redshift indicate whatever else than speed?
May7-08 09:17 PM
3 1,602
Is it successful? What are the mistakes?
May8-08 09:10 PM
4 1,967
I was wondering if someone agrees: Is it possible that on the other side of the black hole is an expanding...
Jul21-10 03:00 AM
32 4,215
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 1,576
Four away from the brightest, five away from the dimmest, Turning and Turning around one sphere, Four away from...
Jul14-04 04:52 PM
13 2,471
How much more of less would you weigh (same as force) at the surface of the sun than on earth?
May3-10 10:51 PM
1 1,226
What are the best two clues, in your opinion, to the nature of Active Galatic Nuclie?
May20-10 02:12 AM
0 865
I'm curious to know, if energy is carried by the bulk motion of matter, that is called... what?
Jul10-08 04:21 PM
2 4,886
I was wondering what experiments or observations have shown that the cosmic microwave background radiation exists...
Feb18-14 06:26 PM
1 524
Hello, guys.. i Need a little help here... My name is Kavin and i'm from Malaysia... See, i want to be an...
Dec29-11 08:35 AM
2 3,275
Im planning on trying out some narrowband filters to hopefully dodge the light pollution here and get some nice...
Mar4-11 01:08 AM
3 1,816
Hi guys, this is a homework question, but i didnt think it belonged with the physics questions. I have the spectrum of...
Jun2-11 09:24 PM
1 1,561
Please help me ya'll. "If the moon was twice as far away from the earth as it actually is, how would tides be...
Oct18-10 01:11 PM
11 8,026
Would you expect comets to follow the ecliptic? Explain.
Mar2-08 04:21 PM
2 1,814
Why do we have to observe ultraviolet radiation using rockets or satellites, where as balloons are sufficient for...
Feb28-08 07:25 PM
6 2,491
Hi all, I'm not sure if this is the correct place to ask such questions, but hopefully someone here can fill me in....
Oct13-05 06:37 AM
2 1,781
I just picked up my first telescope today, a 12" dobsonian. We've had clouds for the last 2 weeks, but thank god...
May16-06 08:32 AM
2 1,348
Hello I understand that red shift is a measurement of relative speed. What I am looking for is what the number...
Dec23-11 03:22 PM
George Jones
7 1,977
I was reading about Leonard Susskind's many theories of how what happens to the information that is 'inside' of a...
May13-11 08:37 PM
1 1,113
If you were to greatly increase the elctrical charge of an extremal Black Hole, (ie, drop a lot of electron in) what...
May11-11 09:59 PM
5 1,093
Have we ever observed microscopic black holes in the LHC?
Sep7-11 03:58 PM
6 3,446
I need to calculate an estimate of the voltage that would be imposed in the magnetopause by the interplanetary...
Feb20-10 06:39 AM
1 1,478
I remember reading an article on exoplanets which suggested that when a star loses its mass, the orbital radii of the...
Feb8-12 04:37 PM
13 3,279
Hi To test the fitness of a certain model to some observational data I use ki_squared goodness of fit test. As you...
Nov24-11 06:42 AM
0 1,209
Here is my understanding, please correct me if I am wrong, thanks At the end of the giant stage of a star, it...
Jun1-14 03:25 AM
5 556
Hi (I hope I'm posting in the right place) In physics class we are currently working with projectories of comets...
Sep20-07 08:00 PM
4 2,549
Are there any pictures of other planetary systems? Are there any close ones? I think I heard a while back of antoher...
Dec29-03 02:50 AM
20 3,417
IN a relatively circular earth orbit, how far away from earth would you have to be in order to avoid collisions?
Sep20-13 11:14 PM
5 1,625
Hi, I've been wondering about the charge balance in the known universe, factors that might alter it, and the...
Aug5-13 06:55 AM
Simon Bridge
7 1,202
I am very intrigued with the suggestion that what we understand of as our universe, may actually be inside of a black...
Sep25-10 07:22 PM
4 1,372
The question is A main sequence star is barely visible at a distance of 20 pc with a certain telescope. The star...
Nov12-10 06:47 AM
5 2,958
Every now and then we come across a deeply ingrained falsehood or half-truth in places that otherwise seem...
Mar21-08 04:17 PM
Ken G
46 4,934
I've often wondered why there is so much misinformation around the topic of the reasons that very massive main...
Feb11-11 08:06 AM
24 3,759
I have a question to ponder. Let's say you had unlimited access to resources, and wanted to reduce the luminosity of...
Feb18-11 05:19 PM
Ken G
4 2,034
There is a great deal of misconception and misinformation surrounding the topic of radiation pressure in stars. I...
Mar27-11 05:10 AM
43 7,528
There have been a few threads of late on the multiverse concept in cosmology, and whether it can be viewed as a...
Jun18-12 03:27 AM
Ken G
43 5,528

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