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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
140 109,353
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 44,006
How can the atoms of a back hole move if they are a compression of so much mass? Maybe black holes in the absolute...
Jan13-05 12:15 AM
13 1,667
In a recent thread I erroneously claimed an obsever falling into a black hole would experience infinite blue shift at...
Nov13-09 11:52 PM
0 1,050
I’ll speak in terms of gravity instead of space-time in efforts to keeps this as simple as possible… Question: The...
Jun24-05 11:26 PM
"Requiescat in pace"
2 1,420
what is the final stage of black hole mean what its the next stage turning to be (in what form ) why black hole is...
Jul16-13 02:55 PM
1 952
Hello, this is my first topic. but i was thinking, Theoretically if you have a way to detect radiation from far...
Dec9-10 09:05 PM
6 1,198
I have heard that a Black Holes gravitation field is so strong, light itself (a form of energy, not matter) can be...
Sep1-11 11:16 AM
4 1,835
I just read an article on that a black Hole was discovered in the process of destroying an unfortunate...
Aug26-11 11:42 PM
2 2,042
I am a geographer with limited experience in astronomy but I have been trying to find connections between the 2012...
Oct6-09 06:08 PM
3 3,957
In thermodynamics, I assume that any closed system that can be described in terms of individual objects/particles and...
Feb3-13 08:57 AM
3 693
Would is be possible for electromagnetism so help something escape from a black hole past the event horizon? Gravity...
Dec1-09 12:28 AM
4 1,161
If it is indeed true that black holes (eventually) evaporate, then once they lose enough mass do they then return to...
Feb27-08 12:51 AM
2 1,877
black holes evaporate, i know that it sounds like it defies all rational elucidation but i think that black holes...
Sep22-10 02:15 AM
21 4,034
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
4 954
During black hole thermal radiation can mass be radiated while entropy stays? Is it possible that entropy stays in the...
Dec23-11 04:44 PM
1 1,856
Hey, my first post here, glad I've found somewhere on the internet to discus this crazy stuff! Anyway heres my...
Mar10-05 08:08 PM
2 2,923
The spacetime geometry outside a black hole may be transformable through the event horizon as the black hole internal...
Apr12-03 11:45 AM
Loren Booda
2 2,794
These damn shows on the Science Channel seem to raise more questions for me than they answer, and maybe I'm...
Dec24-11 03:08 PM
11 3,497
Hello all, Cosmic Variance just had a great post up about Black Holes, wherein they were talking about something...
Oct3-12 07:08 PM
2 1,347
Hi, does anyone know how much of the universes's iron or carbon has been made in supernovae that formed black...
Apr6-14 11:31 AM
Ken G
5 1,032
When a neutron star flucuates into a black hole does the gravity increase tenfold? Or does the neutron star gravity...
Oct24-10 11:04 AM
2 3,297
Hi all! This is not a problem for my homework. It is just something I was reading in my text book and wanted a little...
Sep30-10 11:34 PM
8 1,067
Can anybody tell me if there are any puzzles or anomalies with respect to candidate black holes? For example if we...
Jun5-07 12:12 PM
1 1,313
What is the maximum approximate black hole size that would have negative growth rate as a function of average local...
Apr5-13 03:11 PM
George Jones
2 1,020
Are the two following hypothetical observations contradictory according to GR? 1. Particles fall towards a black...
Jun15-11 02:22 PM
22 3,236
for example take two halves of a black hole as m1 and m2. since we told black hole has no volume so we take distance...
Sep27-12 11:08 PM
3 1,092
Hello, I am a newbie to these forums, so please be patient with me! OK, my first (but not only) problem is getting to...
Sep12-10 04:09 PM
4 2,579
Take a small bh say 100 sol masses, how long would it take to ingest a Earth size planet?
Jan13-12 10:27 AM
Cosmo Novice
6 1,475
(Correct me if you think i'm wrong in anyway, I am open to new ideas.) A black hole is created when a planetary mass...
May17-14 07:47 PM
Simon Bridge
2 634
If a black hole is approaching towards our solar system, at what point could it be detected and is there anything we...
Nov19-10 04:17 PM
14 5,625
I am trying to get my head round this problem but not having studied it I need some help.
Aug16-12 08:42 PM
2 954
I just read an article about recently observed jets emitted from a black hole, apparently due to the extreme...
Jul15-10 09:14 PM
8 2,470
Dear Internet- As part of an introductory Astronomy course, it is time to compile a mock research proposal,...
May29-11 03:21 PM
42 7,938
recently i came to know that the jets of gases from black holes are due to magnetic in effect does this...
Mar4-11 06:49 PM
7 1,229
I have read that coiled up magnetic fields are responsible for the jets that are observed along the axis of rotation...
Feb5-11 02:08 AM
1 1,809 Getting a kick out of numerical relativity John G. Baker, Joan Centrella,...
Mar8-06 07:26 PM
0 1,635
I've been scratching me' head a little. For curiosity's sake i've been trying to calculate what "would" be the kinetic...
Feb29-12 03:10 PM
3 1,175
how long do black holes last before they vaporize?
Jul26-12 05:21 AM
9 2,025
First thread for me. Quick question. If photons mediate electromagnetic forces, and all photons are trapped inside...
Jun5-12 10:08 PM
9 4,765
Hey everyone, I have a quick question. I have to find out how hot a cloud of material falling into a black hole...
Apr15-11 02:12 AM
2 1,559
Is the following breakdown possible with respect to the matter falling into a black hole: + Total Mass falling into...
Jun14-11 02:47 PM
3 918

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