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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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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 89,125
Hi everyone Use this topic for posts about ongoing/upcoming stargazing events (e.g., comets, eclipses,...
Apr14-14 07:08 AM
282 104,740
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
499 147,292
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 38,657
We often have questions about what telescope an aspiring amateur astronomer should buy. The "correct" answer can be...
Apr9-14 07:52 AM
234 80,850
We have lift off. ...
Nov19-05 03:37 PM
4 1,630
Venus currently does not have a magnetic field. I have come across one source that says the rotation plays a part in...
Dec3-09 04:36 PM
11 8,001
photos here: next time, 2117...YOU won't be here to see it then!! ...
Jun8-12 07:58 AM
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Dec11-03 03:11 PM
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Apparantly this one was missed, at least nothing turned up on a search. Obviously you can speculate all you...
Jul6-12 02:12 PM
25 3,467
Jun8-04 11:42 PM
Nommos Prime (Dogon)
0 1,151
This came up in another thread, and now I'm not sure of my answers. 1] Venus' rotation is retrograde. Is that...
May7-06 11:53 PM
8 1,881
I am working with the Keplerian Elements from the JPL web site. a - Semi-Major Axis e - Eccentricity I -...
Jun7-10 02:18 AM
0 1,568
Hipparcus indicates that our supposed closest star alpha centuari is 742 marcs parallax, which corresponds to about...
May21-11 01:32 PM
2 1,984
Um im new to the forms i am an eight grade I am on the natinol honor role I am in algbra 1 i have won the science fair...
Oct15-03 09:40 AM
1 1,365
Does anyone know what the native resolution of Cassini's various cameras are? I'm looking for VERY high resolution (>...
Jan30-06 12:15 AM
2 4,545
wFpeM3fxJoQ VLT (Very Large Telescope)
Aug28-11 10:17 PM
2 1,884
why do stars twinkle? (or why do they look like they're twinkling?)
Apr11-04 09:51 PM
5 1,478
If something hit the Earth billions of years ago and caused a molten blob to be released from it,and this blob settled...
Feb27-07 10:46 AM
7 3,624
Anyone know of a good 10-20 minute video on space travel? Anything that provides sufficient information on space...
Apr28-10 09:39 PM
3 1,252
At a distance of 2-4 AUs, (in the asteroid belt), would you be able to stare directly at the sun? What about the rest...
Nov21-11 11:24 PM
7 2,710
When we view the Milky Way with the naked eye from earth in the winter night sky, we see the streakish 'cloud' of its...
Mar22-07 09:01 PM
8 12,130
Before reading this article please read the following: NEVER view the sun with the naked eye for any length of...
Nov7-11 04:37 AM
1 1,927
How it is possible to capture photographs of milky way. I mean just take a case that we can't take photos of earth...
Nov3-10 05:49 AM
3 1,517
Hello I am not quite sure what resolution i am suppose to see if i look through saturn in my Orion 6" newtonian...
Mar23-09 05:37 AM
24 9,327
Would a galaxy 7 billion LY away appear to be twice the expected size (angular size) as a consequence of the expansion...
Apr26-08 12:54 AM
5 3,158
I live in Oregon on the coast, so not only do clouds get in the way, but so does light pollution (though im sure light...
Nov18-10 11:51 AM
7 3,284
Hey Im looking to buy a fine quality telescope by either Meade or Celestron, a schimdt Cassegrain. I came across this...
Jul28-05 04:57 PM
11 2,254
Hi all, I have a question according to Vilenkin's proposal using GR one borrows the notion that geomerty is not...
Jun23-05 06:25 PM
2 1,417
The universe is infinite so that means that there are an infinite number of planets. Some of these planets are known...
May27-03 11:05 AM
5 1,411
Hope this is the right forum.. What does the community think of Branson's Virgin Galactic? Will it be nothing more...
Nov3-11 03:40 AM
7 2,368 Does VIRGOHI21 Pose a Problem for MOND? Scott Funkhouser, Occidental College,...
Mar12-05 12:52 AM
6 1,735
Was there an early epoch when all particles were virtual - perhaps before the Planck time?
Sep27-05 02:17 AM
1 1,766
Are you too lazy, or cheap, to buy a decent telescope, set it up and cruise the night sky? But would still like to...
Jun22-05 06:14 AM
4 1,422
I was thinking... virtual particle-antiparticle pairs created just inside the event horizon of the universe...
Dec15-04 01:46 PM
4 1,970
I re-read parts of "Genius" by James Gleick earlier today after visiting a web-site that discussed steady-state...
May29-04 06:51 PM
8 1,845
Was wondering: In Hawkins's " Univers in a nutshell" book, he talks about the behavior ov virtual particule pairs...
Mar10-10 04:00 PM
10 2,218
To members of the forum interested in astronomy: Just went to the Starry Night website and my Avast software detected...
Jun6-11 07:48 PM
0 1,912
So this weekend I read a little about the Dresden Codex of the Maya (their astronomical log) and played a little bit...
Apr18-12 07:25 PM
3 1,904
There may have been other threads, wondering about the mystery of Venus. Or to sum up: ...
Sep29-05 01:26 PM
6 3,379
Why haven't we been to the moon in recent years?
Apr1-03 04:13 PM
18 9,817
I have a question about visual binaries on a homework, which is at the link below. Question sheet here In addition...
Apr21-03 06:40 PM
3 1,557
Hello everyone. It is exciting to discover your forum here. I am hoping someone might be able to point me in the...
Dec4-12 11:00 PM
9 1,836
I'm not sure if this is a correct forum for this topic, but I'm wondering if there is any research done on VLF (very...
Dec8-05 02:45 AM
2 3,943
Here are some images from the Very Large Telescope project. Some pictures are over 70MB!! Five Years of VLT -- The...
Oct4-05 09:44 PM
2 3,201

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