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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
marcus
140 111,338
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 44,422
If an object rotates in zero gravity, it generates a small gravity outwards, right? Now, howcome planets attract...
Mar13-09 10:51 AM
D H
12 1,646
Can someone explain all the known paths a star can take from its birth to its death? This is what I know so far....
Mar13-09 10:02 AM
SpiffyKavu
9 1,635
I was wondering about a question that popped into my mind recently -Let's say, theoretically, a device existed that...
Mar13-09 09:32 AM
cristo
24 3,931
l = Phi*L*Gamma(a+2) b) The Sloan Digital Sky Survey (SDSS) has recently measured the following Schechter...
Mar12-09 09:50 PM
IRNB
1 2,258
I know that there are several theories out there about how old the Universe is and how big, etc. I also know there...
Mar12-09 11:35 AM
Djrob99
11 2,100
Why couldn't an observer position himself at the balance point of the gravity between two black holes that are...
Mar12-09 11:17 AM
v2kkim
6 1,756
Hi, I am just wondering what the exact mechanisms of the fireball model for gamma-ray bursts are. I am fairly...
Mar11-09 07:29 AM
madjackal
0 1,295
I've been wondering since a long time how does the space time curve affect the apple. If the apple isn't attracted by...
Mar11-09 05:54 AM
Ich
5 1,396
http://news.yahoo.com/s/afp/20080206/sc_afp/spacesaturnmoon A tiny satellite measuring just 504 kilometres (315...
Mar10-09 04:57 AM
Mammo
5 4,891
As a steady stream of light particles (or any other form of measurable energy) from some distant star, say a billion...
Mar10-09 12:09 AM
Nabeshin
5 1,135
I read that if an observer were to watch as another observer fell into the black hole, eventually observer A would see...
Mar9-09 10:01 PM
Ultrastar 1
6 1,402
Does anyone know the equation used to find the speed of a distant star?
Mar8-09 07:38 PM
Ultrastar 1
11 5,211
Hello all i'm here in the uk just lookin at Betelgeuse and for some reason it looks redder tonight has anyone any idea...
Mar8-09 04:16 PM
scupydog
11 2,585
Possible exit points from this universe to another, or maybe collection points for energy to be saved and reassigned...
Mar8-09 12:18 PM
Ultrastar 1
2 1,223
So What happens to a Black Hole when one dies? I've heard that they just dissentigrate, collapse, etc. What...
Mar7-09 09:13 PM
Infamo
17 9,591
blechman's statement: Gravitons are emitted FROM THE SURFACE of the event horizon (remember: gravitons are...
Mar7-09 02:21 PM
v2kkim
19 3,158
When will the next comet apear for earth viewers. I know that there is almost always a comet or two visable through a...
Mar7-09 01:24 PM
Stratosphere
12 17,591
Hello, I have a question or two about Sir Author Eddington's proof of Einstein's GTR. 1)How did or what technique...
Mar6-09 03:28 AM
plutoisacomet
3 1,759
http://www.superstringtheory.com/blackh/blackh3.html the URL above says that black holes can decay, but I don't...
Mar5-09 08:58 PM
Ultrastar 1
4 1,277
I have a couple of friends from another forum who have just published a stunning book of astrophotography: "Star...
Mar5-09 06:28 PM
turbo
1 1,061
I'm trying to calculate the diffraction limit/angular resolution for the Hubble Space Telescope. I know this can be...
Mar5-09 02:44 PM
mgb_phys
8 1,733
On the night of March 1st, actually March 2nd UTC a small asteroid (2009 DD45) will pass very close to earth....
Mar5-09 12:15 PM
LowlyPion
2 3,684
hello everybody.. there's a possibility of using Fuzzy Logic in the research field of Astrophysics and i came to know...
Mar5-09 07:23 AM
esash
0 1,210
Would it begin to spiral into the sun or would it slip into a new orbit? Don't most meteorite impacts occur due to...
Mar5-09 03:45 AM
Ich
2 4,208
Here's one for everyone to ponder.. Firstly, this question has always bugged me since I was born. It's not impossible...
Mar4-09 06:53 PM
DaveC426913
41 12,800
I had a conversation with a friend about Black Hole images. I showed him a picture of a black hole taken by the Hubble...
Mar4-09 04:44 PM
cesiumfrog
9 1,109
Does anybody know what on- the- spot approximations are and why they are accurate? Also, I cannot figure out why...
Mar4-09 11:11 AM
Dathascome
2 2,434
I often thought meteors are heated by friction when they plunge into the atmosphere. But according to the bellow...
Mar4-09 01:35 AM
Chronos
2 1,321
If you asked any body why things rotate;they will answer you if you mean in astronomy the reson is gravity and if you...
Mar4-09 12:57 AM
Chronos
8 1,879
Hey everyone, I was hoping if any experienced astronomers could help me out here. I'm looking to buy my first...
Mar3-09 10:12 PM
Saturni
6 1,074
Is the furthst star in the sky to the left or the right, when looking at the sky towards the south from Georgia...
Mar2-09 08:06 PM
DaleSwanson
3 1,137
I have become very interested in physics and astronomy recently and have started dabbling. I have been reading...
Mar2-09 08:58 AM
vibjwb
7 2,972
gravity has to have an effect on time,when gravity can curve space ,it also has to influence time,time that has...
Mar2-09 08:13 AM
monty37
8 1,887
What jobs are available for Astrophysicists?
Mar1-09 09:51 PM
v2kkim
2 3,619
Can you find the orbital velocity of a planet which a satellite has to obtain in order to revolve around the planet...
Mar1-09 02:53 PM
.:Endeavour:.
2 17,974
I heard that this year is the Year of Astronomy. Being a "physicist" at the university, a local science teacher...
Feb28-09 03:43 AM
mjsd
5 1,323
Why is the sun's corona temperature around millions of degrees celsius while the sun's surface is about 6000 degrees...
Feb28-09 01:15 AM
DaleSwanson
3 1,834
The Titus-Bode law (and Dermott's Law) hypothesizes resonances in certain orbits. In general, in our solar system,...
Feb27-09 04:13 PM
gtring
0 1,593
how far are we from detecting a moon around an earth sized planet in another star system? i read an article...
Feb27-09 02:37 PM
CutThroatJake
5 1,789
Hi everybody, I apologize if this has been asked already - I searched for a similar topic to no avail. My question...
Feb26-09 06:41 PM
mgb_phys
3 1,396

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