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General Astronomy

- Celestial objects, space, and the physical universe as a whole. Astrophotography and amateur astronomy are welcome!
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Hi everyone Use this topic for posts about ongoing/upcoming stargazing events (e.g., comets, eclipses,...
Apr14-14 07:08 AM
Borg
282 104,667
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
marcus
139 89,058
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...
Dec12-13 08:47 PM
Astronomus
499 147,219
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 38,631
We often have questions about what telescope an aspiring amateur astronomer should buy. The "correct" answer can be...
Apr9-14 07:52 AM
DHF
234 80,769
Much work has been done into detecting potential signals from extra-terrestrials, but I want to discuss the more...
Jan23-04 12:21 PM
Nereid
14 1,487
This is a continuation of the why space travel thread. Try to keep the discussion over there, ok?
Feb2-04 08:06 PM
NanoTech
5 1,018
I was hoping someone would give some advice on the development of this entry on calculating the heat received by newly...
Apr28-11 11:14 PM
gabe69
1 1,813
Hi i was just wondering you when black bodies emit all spectrum of electromagnetic radiation. Now are atmosphere...
Jun24-05 07:31 PM
Nereid
5 4,278
Hello, this has been bugging me for a bit, so some clarification would be greatly appreciated. Say I'm located on a...
May5-12 09:08 PM
Radrook
4 1,760
So, i was on vacation and watching the New Tom Green Show, (which is much better than the old one imho) and this...
Aug18-03 03:15 PM
Gale
9 9,352
say a person wished to learn about astronomy, but the only resource they have is the internet and a public library....
Jan31-04 11:35 PM
theurinal
11 1,804
I know it may be ambitious, but my astronomy club is considering building a small observatory. nothing to special, but...
Aug24-04 07:54 PM
Artman
5 3,979
Well, first off, i founded an astronomy club at school finally, (warren'd be pleased to know that.) It was also...
Jul20-04 02:01 AM
Chronos
10 2,529
Hi I've been meaning to find a correction method for the true location of the sun so when I add the correction to the...
Jun12-12 11:57 AM
hipparchos
8 3,713
Ok, ive just been reading this http://www.cem.msu.edu/%7Ecem181fp/antimatter/antimatter.html and it says that even if...
Apr10-03 02:18 PM
russ_watters
4 1,757
I am having trouble understanding this problem. It has several parts describing a binary star system. The last part...
Sep30-08 04:24 PM
tiny-tim
1 1,940
Good Day Everyone, Been searching this site and the internet for over a week and have not found the answer to my...
Oct17-11 04:16 AM
Gannet
14 4,186
I been looking at various places for measured orbital mechanics properties of the solar system and found very little...
Jun14-10 05:54 AM
Gannet
6 2,112
Reading this about the Origin of the Earth during Hadean Eon at http://www.palaeos.com/Hadean/Hadean.htm And there...
Jun15-10 11:03 AM
Gannet
11 3,848
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 3,433
I assume this is the right forum to ask this question Based on what I think I know, the Earth completes one full...
Sep22-11 05:11 PM
Gannet
4 2,266
Okay, I'm proberly missing something very silly, but if gravity is thought to go the speed of light, how come it can...
Dec7-04 09:42 AM
yanniru
12 1,211
Hello All, Just from the stand-point of the Sun itself and it's environment, is it possible or not to utilize the Sun...
Oct21-08 07:57 PM
CaptainQuasar
18 8,260
Hello, Well let me give a pithy description of whatís going on. There are 6 fixed stars (constellation) within a...
Mar2-05 02:02 AM
Chronos
6 1,505
After three months in orbit, following its launch on 20 April, Gravity Probe B has now entered its science phase. This...
Sep14-04 05:15 AM
Garth
41 3,396
What do members think of this: http://arxiv.org/abs/astro-ph/0411163 ? Garth
Nov10-04 08:11 PM
marcus
4 1,242
What are Giant Galactic Blobs? Perhaps these will give a clue as to the nature of galactic haloes and the...
Jan24-05 06:19 PM
Chronos
39 5,346
In another thread we discussed the nature and extent of the Giant Galactic Blobs!, and the nature of Dark Matter. ...
Jan31-05 05:44 PM
Garth
13 1,627
There will be a conference entitled 1st Crisis In Cosmology Conference (CCC-I) Any takers? Garth
Mar12-05 10:48 AM
SpaceTiger
60 5,099
Another possible crisis for the standard cosmological model? An old quasar in a young dark energy-dominated universe?...
Apr5-05 07:43 PM
turbo
6 1,458
That is interesting ST. How dense is the inter-galactic-cluster medium? Garth
Jun1-05 04:15 PM
Garth
9 2,637
What do members think of this paper? It reads as 'crackpot' to me, claiming as it does that gravitational waves cannot...
Jun10-05 03:20 AM
Chronos
12 1,541
SpaceTiger has created a very valuable thread on Mainstream Cosmology. For good scientific practice it is important to...
Jul18-05 03:56 PM
Phobos
67 6,017
http://www.arxiv.org/abs/astro-ph/0508624 This paper offers a fairly natural explanation for the universality of...
Sep4-05 12:17 AM
Garth
2 1,999
An Old quasar in a Young Universe? On the arXiv today:Age of High Redshift Objects - a Litmus Test for the Dark...
Sep12-05 04:07 AM
Garth
14 1,774
An anomalous concentration of QSOs around NGC 3079 by E.M. Burbidge, G. Burbidge, H.C. Arp and W.M. Napier - who else?...
Nov2-05 01:04 PM
turbo
11 1,416
Living in the Multiverse by Steven Weinberg My thoughts exactly - well I'm not so sure I'll bet the dog! ...
Nov5-05 02:26 AM
SpaceTiger
7 1,584
Recent Supernovae Ia observations tend to rule out all the cosmologies by R. G. Vishwakarma, Zacatecas University. ...
Nov30-05 08:58 PM
Nereid
7 1,996
Probing the Shape of the Galactic Halo with Hyper-Velocity Stars Do they need a SMBH to sling shot them or would...
Jan28-06 11:05 AM
Garth
2 2,575
Is the identification of a GRB with a 'hyper-nova' at z = 6.295 when the universe was 900 Myrs old (standard model)...
Mar10-06 01:30 AM
Garth
5 1,720
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 2,304
Flying Over the Columbia Hills of Mars Garth
May19-08 01:24 AM
Garth
0 1,447
Rosetta Spacecraft Passes Asteroid Steins . Garth
Sep9-08 08:11 PM
marcus
1 1,071
Check out the University of Arizona's Huygen's Titan Descent Movie Garth
Mar2-13 10:05 AM
Velikovsky
7 1,841

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