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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
282 104,963
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 89,331
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...
Apr22-14 01:42 PM
spark802
502 147,585
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 38,730
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 81,156
I realise this may be a really obvious question, but wikipedia and google haven't help settle my curiousity. If the...
Nov18-05 04:05 PM
pervect
5 1,302
Hi Everyone... I really want to be able to calculate the RA/DEC of a Satellite from TLE data. For example, the...
Mar7-08 09:01 PM
D H
4 3,902
Hi. Wikipedia says, that for the external observer, time stops at the event horizon. Is then, for the external...
Jun7-12 11:44 AM
mfb
7 1,651
I'm only talking about galaxies far enough away where the only significant motion between us and them is caused by the...
Jan15-11 07:56 PM
marcus
9 2,502
Also, is there something to look for in particular when you're buying binoculars for stargazing?
Feb4-11 11:46 AM
turbo
4 1,671
I'm reading Nick Strobel's astronomy notes. I should mention that it's an excellent website for an amateur like me. I...
Jan24-08 01:57 PM
chroot
9 3,266
So how about it? What is your estimate or guess at the number of planets or other environments in the universe ] that...
May25-03 10:25 PM
drag
5 1,401
The other thread asks about life in the universe. How about the number of planets in the galaxy that support...
May29-03 05:25 PM
heusdens
12 1,490
"The first ever map of the neutrino sky has been produced by a novel telescope encased in ice at the South Pole. " ...
Jul17-03 10:07 PM
Ivan Seeking
0 1,209
"Seip's picture -- and the dozens of others at his well-organized website -- illustrates the remarkable effect of...
Jul23-03 01:24 AM
Ivan Seeking
0 1,552
"Some of the stars are up to 120 times larger than the Sun. Their discoverers called them extreme in every way. They...
Jul25-03 09:55 PM
Simfish
1 1,509
"JOHNSON SPACE CENTER, Texas (AP) -- The space shuttle engineers who desperately wanted zoom-in satellite pictures of...
Aug11-03 11:26 AM
Phobos
2 1,376
"A team from Los Alamos National Laboratory has released the most in-depth Mars water map yet - showing how much water...
Jul30-03 02:51 AM
Ivan Seeking
0 1,615
"Unusual warm spots on Mars might represent "ice towers" similar to those seen in Antarctica, say researchers. They...
Aug1-03 06:22 PM
Shadow
1 1,684
"PASADENA, California -- The two moons of Mars -- Phobos and Deimos -- could be the byproducts of a breakup of a...
Aug4-03 04:54 PM
Phobos
2 2,122
"There is no place like Mars for fueling speculation about geologic features that must have been created by...
Aug4-03 01:17 PM
zoobyshoe
3 2,054
"Science has a better understanding of how and when the moon came to be thanks to a team of German geochemists who...
Aug19-03 02:48 PM
I, Brian
1 2,014
http://space.com/spacewatch/where_is_mars.html
Nov16-03 10:28 PM
zoobyshoe
18 3,475
http://news.bbc.co.uk/2/hi/science/nature/3109910.stm
Sep24-03 03:51 PM
Nereid
4 2,723
http://www.newscientist.com/news/news.jsp?id=ns99994172
Sep18-03 12:09 PM
Artman
1 2,041
http://www.jpl.nasa.gov/galileo/countdown/impact.html
Sep20-03 09:21 PM
LURCH
1 2,210
http://news.bbc.co.uk/2/hi/uk_news/wales/south_east/3155928.stm
Oct15-03 09:48 AM
ranyart
6 3,757
http://news.bbc.co.uk/2/hi/science/nature/3158496.stm
Oct12-03 10:19 AM
Phobos
3 1,754
http://space.com/scienceastronomy/mars_mgs_031007.html
Oct10-03 12:01 PM
Nereid
6 3,026
http://www.cnn.com/2003/TECH/space/10/08/alien.life.reut/index.html
Oct14-03 12:43 PM
marcus
15 2,391
http://www.newscientist.com/news/news.jsp?id=ns99994321
Nov8-03 09:53 AM
Labguy
11 1,865
http://www.cnn.com/2003/TECH/space/11/05/voyager.solar.boundary/index.html
Nov10-03 05:29 PM
LURCH
6 1,418
http://space.com/searchforlife/seti_alien_shostak_040122.html
Feb9-04 08:40 PM
Nommos Prime (Dogon)
14 1,925
http://space.com/images/031014_huygens_02.jpg http://space.com/scienceastronomy/titan_probes_040203.html
Feb5-04 01:22 PM
Phobos
1 1,585
http://news.bbc.co.uk/2/hi/science/nature/3517319.stm
Mar4-04 06:19 AM
Novitas
12 1,940
http://space.com/businesstechnology/technology/moonbase_next_040303-1.html
Mar4-04 04:17 AM
Ivan Seeking
0 1,304
http://www.space.com/scienceastronomy/xray_saturn_040308.html
Mar9-04 12:10 AM
Ivan Seeking
0 2,830
Could it be...? :eek: http://news.bbc.co.uk/2/hi/science/nature/3577551.stm
Mar30-04 06:51 PM
Nereid
1 1,566
http://antwrp.gsfc.nasa.gov/apod/ap040321.html
Mar31-04 04:39 AM
Tsu
1 1,471
http://space.com/scienceastronomy/mystery_monday_040412.html
Apr13-04 02:31 AM
Ivan Seeking
0 1,712
http://story.news.yahoo.com/news?tmpl=story&cid=2026&ncid=2026&e=10&u=/latimests/20041221/ts_latimes/gravitymayloseitsp...
Mar1-08 05:13 PM
HenriPoincare
65 11,170
This is probably the third time that I have heard or read conflicting reports on this. ...
Apr17-08 12:42 AM
Ivan Seeking
54 17,715
http://science.nasa.gov/headlines/y2007/15aug_mira.htm?list213022 Audio...
Aug17-07 01:18 PM
Ivan Seeking
3 1,687
http://www.space.com/scienceastronomy/071029-mm-mog-theory.html
Nov21-07 04:29 PM
Moonbear
90 11,755
http://news.nationalgeographic.com/news/2007/11/071107-russia-crater.html
Nov24-07 02:05 PM
Michael Mozina
2 1,595

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