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- Celestial objects, space, and the physical universe as a whole. Astrophotography and amateur astronomy are welcome!
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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 38,709
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.
Apr10-13 11:08 AM
139 89,269
We often have questions about what telescope an aspiring amateur astronomer should buy. The "correct" answer can be...
Apr9-14 07:52 AM
234 81,068
Hi everyone Use this topic for posts about ongoing/upcoming stargazing events (e.g., comets, eclipses,...
Apr14-14 07:08 AM
282 104,898
astrophotography, photos Sticky Thread Pinned: Astrophotography photos ( 1 2 3 ... Last)
Looking for advice? Willing to share your expertise with other PF members? Brave enough to share & discuss your...
Y 01:42 PM
502 147,492
Television shows about astronomy explain the formation of our solar system as a result of remnants of a supernova....
Oct4-10 09:26 PM
3 4,209
Life on Mars? The question is not whether there is life on Mars, but whether life existed on Mars long ago.
Oct5-10 02:30 AM
14 3,209
Hello expert I have downloaded several star catalog. But how can I open the file? How can I read the file? I would...
Oct6-10 05:06 AM
2 1,330
I was perusing an astronomy homework site and came across a question in which they are asked to plot the positions of...
Oct6-10 01:34 PM
4 2,383
I was wondering if anyone here had experience using the image dataset of the Sloan Digital Sky Survey. Specifically,...
Oct6-10 10:55 PM
2 1,341
Hi newbe here. Can someone confirm an experiment I just made on a Meade 2x telextener (tele extender) and a Tele...
Oct7-10 04:33 AM
5 1,886
Hi, a novice astronomer here. Was just looking at some stars/galaxies/planets the other day, and followed up some...
Oct7-10 07:14 AM
6 4,400
Given the following: Its a polar graph. I am trying to figure out when is VENUS visable in the sky during this...
Oct7-10 05:15 PM
14 2,915
Ok, just trying to figure out the angular size of venus. I have charted and figured out the distance between Earth and...
Oct7-10 09:45 PM
9 6,948
I was trying to fall asleep last night and began to ponder about the universe. This isn't something unusual, it helps...
Oct8-10 04:07 PM
11 2,961
This is my question from my intro to astronomy course, and its driving me insane. I vaguely understand how to...
Oct8-10 11:14 PM
0 2,884
seen a programe about super black holes in wich some stars where orbiting them . speeding up as they are slingshoted...
Oct9-10 07:55 AM
16 3,224
How would I come up with an equation (in one dimention), for the airy pattern of a telescope with a given diameter...
Oct12-10 02:06 AM
1 1,272
John Huchra Dies at 61; Maps Altered Ideas on Universe
Oct14-10 03:36 AM
1 1,215
Hey guys, Im trying to write something up, and I want a more detailed explanation of this calculation (image...
Oct14-10 03:37 AM
4 2,321
I am sure this must have been asked before but here goes. If two black holes were on a collision course with each...
Oct14-10 03:46 AM
4 1,864
--- >> a question…… it is said that a few seconds after the big bang , the subatomic particles gradually lost energy...
Oct14-10 03:55 AM
6 2,874
Is it just because the moon moves in and out of view quicker than the earth moving in and out of view as to a lunar...
Oct14-10 05:21 PM
3 2,347
Is there any way to determine how big a black hole is? I googled the question but I didn't find any answer.
Oct16-10 05:03 AM
4 1,490
You can measure the distance to an object orbiting the sun using parallax, and you can determine its angular velocity...
Oct16-10 05:41 PM
Filip Larsen
4 1,429
Please help me ya'll. "If the moon was twice as far away from the earth as it actually is, how would tides be...
Oct18-10 01:11 PM
11 7,584
Am I correct here. Wanning crecent would a thin sliver of a Moon visible in the early morning, just before...
Oct18-10 09:00 PM
4 1,827
Ok, here is the problem I have: Figure 2 shows the Moon in its orbit about the Earth, as viewed from space high...
Oct18-10 09:38 PM
13 2,178
Is it possible for a cloud of gass to condense around a black hole and for fusion to start? Or another way to ask. ...
Oct19-10 07:28 PM
Mu naught
1 1,556
Of course earths orbit is not circular, but Is Earth’s orbit far from circular? Thanks
Oct20-10 02:27 AM
1 1,169
Heyy, i've had a telescope before and know how to use them. Has anyone got any advice on a second model that I could...
Oct20-10 02:31 AM
3 943 I was looking at...
Oct20-10 02:37 AM
3 1,408
Hey, Let's say you have a theory something to do with astronomy. You have not done any research on it, and its...
Oct20-10 02:41 AM
16 2,331
What is the difference between the time scales of Greenwich Mean Timt, GMT and Universal Coodinated Time, UT? I...
Oct20-10 02:48 AM
2 1,424
I am in New Mexico and currently planning a telescope purchase but quite confused with all that is available. Seeking...
Oct20-10 02:53 AM
4 1,107
What would be the outcome of an elliptical medium size galaxy colliding with a dwarf elliptical? (I choose a dwarf...
Oct20-10 03:14 AM
2 1,398
Calculate the Earth-Sun distance during perihelion (at Earth’s closest approach) The Earth’s orbit has a semi-major...
Oct20-10 08:04 AM
9 5,297
Hi there, physics nerds! I'm studying astrophysics in Copenhagen, and I had the opportunity to visit a telescope in...
Oct20-10 10:01 AM
1 1,044
Good afternoon, Suppose a two-body problem, where both bodies, of masses m1 and m2, are under influence of their...
Oct20-10 02:52 PM
0 972
is the math correct? 57.3 x d_o/d d_o = size of object which is 1.392 x 10^6 km d = distance to the object which...
Oct20-10 05:39 PM
1 1,550
WASHINGTON (AP) Hidden in a Hubble Space Telescope photo released earlier this year is a small smudge of light that...
Oct20-10 06:03 PM
0 1,536
Is the Moon’s orbit more or less elliptical than the Earth’s? How does this affect the range of angular sizes for the...
Oct20-10 11:21 PM
6 1,572
A quick explanation for my thread - I've been a physics teacher for 10 years, but I've always wanted to learn more...
Oct21-10 04:28 AM
8 3,673
I have a toy telescope, very poor objective aperture like 30mm, the image is very poor. I was wondering if I could...
Oct21-10 11:34 AM
Andy Resnick
1 2,070
I am intrigued by the Dawn mission to Vesta and Ceres---the two largest in the asteroid belt. Ceres is now rated...
Oct23-10 01:29 PM
0 1,849

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