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- Celestial objects, space, and the physical universe as a whole.
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Jan16-12 Greg Bernhardt
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 45,306
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
140 114,280
ok, here it goes: this afternoon, wandering on wikipedia I stumbled accross a 3D projection of a rotating tesseract...
Nov26-12 07:38 AM
mfb
9 1,635
Just wondering what the general scientific community thinks about this topic.
Aug15-04 08:17 PM
Entropy
18 12,401
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
marcus
2 1,188
http://physicsweb.org/article/news/7/10/5
Oct11-03 11:56 AM
Phobos
1 2,322
Would the conservation of mass apply to the universe? Sorry I looked for awhile for the answer to this question but I...
Sep20-10 01:26 AM
Chronos
2 2,586
A simple question. I might ask this as well: Is the universe causal? The reason I'm asking this is that today I've...
Apr14-14 09:51 PM
Drakkith
16 1,696
I am only casually interested in astronomy so its rather difficult for me to articulate my thoughts, but I will try my...
Jul14-12 11:10 AM
phinds
3 1,583
Maybe not the correct sub-forum for the question, but is the total amount of water on the planet constant ? I know...
Feb11-14 04:45 PM
Borek
15 2,179
And consequently provides zero resistance? Link:http://www.nature.com/nsu/040112/040112-7.html
May18-04 01:21 AM
Olias
4 1,651
Since nebular theory states that our solar system formed from the gravitational collapse of a giant gas cloud. ...
Jun18-10 06:29 AM
Gannet
4 4,203
My educated guess is that you can see the sun if you were standing on the moon. Having said that, why isn't there any...
Sep14-12 01:56 AM
trollcast
36 5,327
is the Sun a sphere (like the Earth) or is it more oval-shaped and elliptical? because, since the Earth is (nearly)...
Jun20-03 11:18 PM
Echo 6 Sierra
4 3,990
Hey everyone. Let me preface this by saying, I love physics and astronomy, but am by no stretch an expert in either...
Sep16-12 11:50 PM
twofish-quant
8 1,880
Is the sun actually dying because I have heard a lot of good scientists near where I live say that it is and is not,...
Dec11-08 08:17 PM
hage567
30 21,514
By "Is the sun anchored" I am referring to its place relative to the planets. I am pretty sure the answer is yes,...
Feb26-09 04:39 AM
Mentallic
8 1,677
Consider a photon of a certain frequency emitted from a distance slightly greater than the event horizon of a black...
Feb18-11 06:40 PM
MikeGomez
5 1,868
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
Nabeshin
1 933
Speed of light, (“Constant” contradictions); http://www.newscientist.com/news/news.jsp?id=ns99992796 Electrical...
Mar23-04 12:05 PM
Phobos
3 4,383
Hello, I have a question about sunspots, to which the answer i could not find using google. Is the solar brightness...
Apr28-10 01:15 PM
Max.Planck
8 3,359
What evidence proves that photon emission of an object, - at all sends some of its momentum back to the source, - and...
Nov18-12 11:03 AM
mfb
29 4,235
Lammerzahl, Preuss & Dittus' paper Is the physics within the Solar system really understood? claims that the following...
Aug9-09 05:28 PM
russ_watters
7 2,363
Basically, all more distant galaxies have a Red Shift that increases with the distance to the galaxy, the Universe is...
Sep24-12 01:19 AM
twofish-quant
2 1,124
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 5,637
I have always wondered why the moon doesn't look blurred to us if earth is spinning so fast, or are we spinning so...
Jun10-13 08:52 AM
litup
5 2,517
I've mentioned this before, the problems that might arise if the moon were to leave our orbit. However, I never really...
Dec13-03 05:14 PM
Rader
15 5,601
The 'measurement' of the radial expansion of the moon's orbit is 3.8 cm/yr...
Jul24-09 04:27 PM
map19
14 4,560
I saw on t.v. that the moon's distance to earth as measured by lasers reflecting off of the mirrors left on the moon...
Aug8-09 12:36 PM
Bob S
6 1,486
And if so, at a rate faster or slower or the same compared to at earlier times of the universe?
Sep26-13 02:52 PM
Drakkith
13 6,091
Where is the matter of black holes? It seems the matter which ever formed or fell into a black hole, is somehow still...
Sep29-04 05:37 PM
Gerinski
4 1,810
It is known since Hawking that an observer "a rest" at some far distance of a black hole sees a thermal radiation...
Mar28-12 05:03 PM
PAllen
7 1,973
I have recently read a few things about the local interstellar clouds and while I am by no means a science expert,...
Jan10-13 01:31 PM
phinds
3 1,306
If so, how??
Sep25-13 08:31 PM
Drakkith
2 1,912
cause the universe is expanding so it s doing work is increasing and the total Q energy in the universe is constant so...
Oct20-05 03:45 PM
pervect
1 1,869
Is the experiment to find water on Mars by NASA is most idiotic experiment ever conducted by mankind. I mean,...
Jul29-13 08:41 AM
D H
6 1,379
If we can see equally far in every direction, which I believe is true, then that makes the earth the centre of the...
Apr30-08 02:59 AM
cristo
2 5,707
Dark matter was introduced in order to make General Relativity (GR) compatible 1. with the rotational speed of...
May1-12 02:09 PM
Dotini
7 1,779
This has been bugging me for some time and I'd love to get a clearer picture. We know that photos from the various...
Sep28-04 01:56 PM
Phobos
8 1,317
i.e something happening out of nothing or was there no birth at all and all that exists today existed since forever?
Nov22-10 04:29 PM
PhysDrew
23 4,158
Is the Andromeda Galaxy going to collide with the Milky Way? I've heard that the Andromeda Galaxy is going to...
Feb18-05 11:29 PM
Labguy
9 4,830
It is, according to this article on Space.com. http://www.space.com/businesstechnology/050708_teleportation.html ...
Jul21-05 10:39 PM
Danger
31 6,294

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