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- 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
140 105,844
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 43,298
Hello all, for the past few weeks my friend and me have been working on a project involving simulation of orbital...
Mar1-07 09:12 AM
4 6,847
The costs are huge. However, is it possible not having a huge amount of money?
Feb6-08 01:32 PM
Abbas Sherif
3 2,438
What is the azimuth and altitude of the star vega because i am not sure I got the right star so could anyone help me?...
Sep22-08 01:29 PM
4 4,718
In a brief history of time it says theft 'according to the uncertainty principle rotating black holes should emit...
Jul29-12 05:26 AM
3 1,491
I saw this image when I was a kid. The photograph of Jupiter taken by NASA's Voyager. Beautiful. But nothing special...
Sep3-12 11:28 PM
3 1,463
Hello all, I am an amateur science fiction writer and have been doing some research on the theories behind...
May11-10 11:20 PM
5 1,879
So this has been really bugging me over the past few days (and forgive me if the answer is so simple). Let's say we're...
Jun12-14 01:45 PM
5 992
So I'm not huge when it comes to physics. In fact I only created and account in order to ask this question. I'm am...
May15-11 01:33 PM
4 3,259
We're covering flux/luminosity/magnitudes etc in Astrophysics module at the moment but I'm getting myself into a bit...
Feb24-09 05:01 PM
1 3,671
If an object is entering a black hole, it would be accelerating at a constant rate. If that object's matter was...
Oct26-07 07:36 PM
Chris Hillman
2 1,505
so if the point of infinite density is infintessimally small, then it is a point right? If so, then wouldn't it be a...
Nov17-07 11:55 PM
Chris Hillman
5 2,299
I've been reading some books on Galactic Structures and Galactic Evolutions, evidence from rotation curves of stars...
Dec1-03 07:50 AM
5 10,311
I had been working through ph237 Gravitational Waves through Kip Thorne's web site over the past year or so. It's been...
Jan20-08 12:49 PM
3 2,011
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
3 869
hi fellas, I have been working on Chandrashekhar limit, and I found a mass-radius relationship for the nonrelativistic...
Jul15-14 01:08 AM
3 1,236
hi guys, i have a question on the celebration of islamic holy months. if Saudi arabia declares the biginning of...
Jul10-13 04:23 AM
2 1,538
hi guys, i have a question about the orbit-spin relationship of the celestial objects. for example in our solar system...
Sep7-13 12:00 AM
4 2,810
hi guys, I have been doing a research on white dwarf stars and chanrashekhar limit. I need to plot a graph for the...
Jul15-14 01:06 AM
4 1,036
We know if the value of omega (the average mass of all matter int he universe was) was more than 1, the ultimate fate...
Nov7-05 04:31 PM
cosmic time
3 1,354
Considering a infinite unbound universe in 4 spatial dimensions, could the cosmic expansion be explained if we...
Dec25-07 03:59 PM
9 2,234
Are there any estimates of the total aggregate mass of all the black holes in the universe? How does this compare...
Apr3-08 05:10 PM
5 2,253
Im sure everyone has heard about the astroid with the slight chance of hitting earth in 2035 once it makes its pass 6...
Nov18-09 04:21 PM
0 880
Since the earth and the sun have a common center of mass in which the sun has its "wobble" thing goin wouldn't that be...
Mar22-10 05:14 AM
9 1,494
I have just came up with the following idea which can, with the proper equipment and technology, be applied in space...
Sep24-09 07:08 AM
10 1,622
In terms of physical dimensional size, what are the measurements a black hole must fit in order for it to actually...
Oct5-09 08:20 AM
12 1,532
My question goes like this: Did the inflation following the Bing Bang caused matter to emerge as it is in our...
Oct13-09 03:33 PM
9 1,127
exoplanets seem all to have elliptical orbits, and when you look at our solar system the orbits are all nice and...
Jun4-09 01:08 AM
3 1,215
Is it possible to calculate the rotation speed of a black hole? Idid not find anything on this on google. thanks
May18-09 02:30 PM
5 1,296
ok, this may seem comical, but here it goes,:blushing: lets say I dig a hole right trough the planet, ignoring the...
May22-09 01:15 AM
3 1,335
what is the difference between antimatter sun and a matter one, thanks.
Jan31-11 07:40 PM
17 4,358
So ive read that super earths masses 2-10 can be habitable hold thick atmosphere and generate plate tectonics. So im...
Sep12-12 02:07 AM
5 2,077
Hey! I have a question, whose answer I was unable to get after reading some articles regarding neutron start. I've...
Sep10-07 09:28 AM
15 2,608
Can anyone give me a rough idea of a timescale for first planets in the Universe? I understand that supernovae are...
Jul12-11 05:13 PM
1 2,026
Hey, I am really interested in cosmology especially the acceerating vs. decelerating universe debate and I was...
Nov30-04 07:16 AM
7 1,899
Anybody else see this Seems Titans clouds arn't...
Oct30-04 02:37 AM
2 1,244
is this arthicle true? or is it just mostly hype? here
Mar23-05 08:54 AM
2 1,397
Look here Is this valid reasoning? I noticed it...
Oct26-05 03:16 PM
67 7,985
I have spent about four year of my research (ph.d) working in the field of cosmolgy. I like it very much and I want to...
Nov12-04 07:29 AM
8 1,553
can somebody help me to find an expression for the density contrast (in fouruer space; delta_k) in a moving frame....
Nov18-04 09:22 PM
2 2,254
Do anybody have an idea : out of 100 papers posted on arXiv how many actually get published ?
Dec2-04 10:22 AM
1 1,583

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