General Astronomy

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Pinned: Astrophotography ( 1 2 3 4 ... Last) Phobos	T 07:54 AM glappkaeft	457	124,958
Pinned: Astronomy events schedule ( 1 2 3 4 ... Last) Phobos	May17-13 09:51 PM davenn	271	87,142
Pinned: A&C reference library ( 1 2 3 4 ... Last) Phobos	Apr10-13 11:08 AM marcus	139	73,065
Pinned: Planning to buy a first telescope? ( 1 2 3 4 ... Last) turbo	Feb26-13 09:59 AM Chronos	219	59,968
Pinned: Classic Papers in Astronomy and Cosmology ( 1 2) SpaceTiger	Nov28-12 01:12 AM stargazer3	17	30,822
How do you define a planet's rotation? oay	Jul18-12 06:23 PM DaveC426913	12	1,145
Why do all the planets orbit in the same plane? H QEDrpf33	Jul18-12 09:04 AM Drakkith	16	17,602
Pulsar's spectrum alialice	Jul18-12 08:29 AM alialice	2	919
How is it possible to live past the event horizon? ( 1 2) spacetimedude	Jul18-12 03:31 AM someGorilla	19	2,465
Night sky and supernova questions Government$	Jul17-12 12:34 PM DaveC426913	9	1,037
Pluto's color changes as it makes its closest approach? jarroe	Jul15-12 08:17 PM Drakkith	1	863
Calculating the magnitude kapella	Jul14-12 05:09 PM Chronos	2	732
Can we see Earth in the past? kevpatts	Jul14-12 02:35 PM mfb	6	1,338
July 10th Observation Question Aero51	Jul14-12 12:52 PM Aero51	4	765
Is the universe "flat" ? Erik B	Jul14-12 11:10 AM phinds	3	1,121
Dark Matter - How strong is it at a galaxy periphery? Bjarne	Jul10-12 01:30 PM mfb	1	957
Size of the Universe? I'm confused. TheSwamper	Jul10-12 12:52 AM bioinfinity	7	2,317
Dark matter is the thread connecting galaxy clusters arabianights	Jul9-12 03:58 PM SpaceTiger	3	1,313
Could dark matter be invisible bound states of ordinary matter or ehm, aliens? C Antti	Jul7-12 07:39 AM ZapperZ	1	1,618
Venus Spinning Slower Than Thought C ( 1 2) Andre	Jul6-12 02:12 PM D H	25	2,691
Are neutron stars immortal? Dremmer	Jul3-12 01:11 PM lpetrich	9	1,857
Frustrated Over Tonight's Morgan Freeman Show C BadBrain	Jul2-12 06:44 PM BadBrain	15	2,280
black holes Dremmer	Jul2-12 04:34 PM Alex1	16	1,679
black hole question FOIWATER	Jul2-12 08:08 AM Naty1	4	961
Volcano in Venus Mehrdad1	Jun29-12 08:59 PM davenn	8	1,282
dsi imaging issues Chronos	Jun29-12 05:37 PM Chronos	10	992
For Just How Long Has the Periodicity of Halley's Comet Been Known? BadBrain	Jun29-12 04:21 PM BadBrain	2	987
Supernova in Andromeda Galaxy? Thecla	Jun29-12 05:03 AM Drakkith	4	1,316
List of Astronomical Associations / Astrologist in USA exchanger107	Jun29-12 01:55 AM Chronos	1	757
Ladies and Gentlemen! Voyager 1 Has Left the Solar System! ( 1 2 3) BadBrain	Jun28-12 03:59 PM Hercuflea	35	4,264
Comet near the sun whose orbit is? dolphinsny	Jun28-12 08:24 AM Integral	7	1,584
The Sun as seen from 120 AU. beginner49	Jun27-12 07:17 PM Dickfore	5	1,765
Dark Matter or Modified Gravity ? ( 1 2 3) wilha	Jun25-12 10:10 PM Old Smuggler	37	3,528
Birth of Time T= 0 or T ≠ 0. blackskynet	Jun25-12 12:41 PM Chronos	2	1,069
Should the Astronomical Unit be replaced by the Light Second/Light Minute Etc.? ( 1 2) BadBrain	Jun25-12 08:48 AM tiny-tim	23	1,965
Can quasar gets converted into pulsar? Mehrdad1	Jun24-12 04:12 AM Mehrdad1	4	853
Images of the Universe Frank Stepien	Jun22-12 03:10 PM BadBrain	15	2,332
Heliosphere's Long-theorized Bow Shock Does Not Exist chemisttree	Jun21-12 10:27 AM Storm89	7	1,503
Need specific Hubble images. Archive does not have them. Peb63	Jun21-12 09:17 AM Peb63	2	871
Position of the Sun and Moon in ECEF coordinates Trolll	Jun21-12 08:30 AM phyzguy	3	1,373
Can gravity increase on its own? schiz0ai	Jun20-12 03:31 PM vociferous	7	1,624
spatially infinite universe calios	Jun20-12 08:50 AM Naty1	3	1,270
Calculate foci of planetary orbit given known parameters NR CarlosMarti12	Jun19-12 01:09 PM CarlosMarti12	0	824
Mysterious Night Sky Object - Help!? NeuronsAtWork	Jun19-12 03:12 AM NeuronsAtWork	15	1,890
Is it possible that Our universe could be a tiny spec in a say, sandbox? C Minchken	Jun17-12 03:46 PM Integral	5	1,934

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