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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
marcus
140 114,068
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
stargazer3
17 45,225
Can anyone explain how to graph Right Ascension and Declination on a globe graph?
Jan30-08 02:32 PM
chroot
7 6,007
This question was recently on a test for our Astronomy Class. I was extremely confused by the question and the logic...
Jan29-08 01:00 PM
Commodore
4 4,448
If we were to take the present Earth and set it into gravitational orbit around another star revolving at a rate of...
May23-06 12:51 PM
Phobos
10 2,130
Hi, new here, my first post. Like many people here, I'm no astrophysist, but I have an active interest in our solar...
Dec27-07 02:59 AM
pseudo
9 4,876
Hi, I have recently been reading that the currently favoured theory for the origin of the moon is that a Mars...
Jan15-11 07:40 PM
Vanadium 50
21 3,631
Just a light-hearted post. What are in your opinion, the freakiest things in our solar system. Here are my votes. ...
Jan8-08 04:36 PM
russ_watters
15 5,501
Hi, I'm not good enough to contribute answers yet, but I hope to entertain you with questions. Practically all...
Jan11-08 05:48 PM
chemisttree
12 3,968
Hi, Judging by the questions and answers, there are obviously many talented physics and astrophysics professionals...
Oct8-10 07:55 AM
conan
16 3,179
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
gagiz
4 8,904
The costs are huge. However, is it possible not having a huge amount of money?
Feb6-08 01:32 PM
Abbas Sherif
3 2,449
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
Borek
4 4,777
In a brief history of time it says theft 'according to the uncertainty principle rotating black holes should emit...
Jul29-12 05:26 AM
stevebd1
3 1,532
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
Drakkith
3 1,490
Hello all, I am an amateur science fiction writer and have been doing some research on the theories behind...
May11-10 11:20 PM
connectivity
5 1,895
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
CWatters
5 1,098
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
Nik_2213
4 3,307
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
constellation
1 3,732
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 1,518
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 2,318
I've been reading some books on Galactic Structures and Galactic Evolutions, evidence from rotation curves of stars...
Dec1-03 07:50 AM
Nereid
5 10,665
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
neutrino
3 2,046
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
cooper607
3 889
hi fellas, I have been working on Chandrashekhar limit, and I found a mass-radius relationship for the nonrelativistic...
Jul15-14 01:08 AM
cooper607
3 2,145
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
Bobbywhy
2 1,619
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
Janus
4 2,958
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
cooper607
4 1,902
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 1,366
Considering a infinite unbound universe in 4 spatial dimensions, could the cosmic expansion be explained if we...
Dec25-07 03:59 PM
Garth
9 2,249
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
Wallace
5 2,441
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
CosmicCrunch
0 887
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
qraal
9 1,509
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
Cosmicon
10 1,642
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
Wallace
12 1,558
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
twofish-quant
9 1,145
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
AnalynSarte
3 1,230
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
cosmicpencil
5 1,307
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
Chronos
3 1,351
what is the difference between antimatter sun and a matter one, thanks.
Jan31-11 07:40 PM
lpetrich
17 4,428
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
Chronos
5 2,112
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
SpaceTiger
15 2,637

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