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Astronomy & Astrophysics

- Celestial objects, space, and the physical universe as a whole.
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Jan16-12 Greg Bernhardt
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.
Jul3-14 06:29 PM
140 104,307
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 43,015
What is the maximum wavelength of m101 seen from the Earth by eye?
Sep28-07 08:27 AM
2 2,203
Can an airship rotate the Earth and the Earth is not in eliptical orbit's focus ?(can be in center?)
Oct8-07 10:03 AM
4 1,422
Can someone explain all the known paths a star can take from its birth to its death? This is what I know so far....
Mar13-09 10:02 AM
9 1,630
if a star collapses in its all sides simultaneously, why it become a flat disk later? (as if it crunches to the...
Aug19-09 05:05 PM
meni ohana
6 1,837
Hi! my question is, if space expand, how come the stars (and planets) don't? they are part of the space and not...
May19-10 04:50 PM
2 1,703
Besides low gravity and high doses of radiation, one of the more intractable difficulties in terraforming Mars is that...
Apr14-13 04:24 PM
3 970
From what I've been told, the temperature in space is approx. 3oK if not in direct contact with infrared rays from the...
Dec6-08 08:41 AM
33 3,759
Has anyone else heard about this?
Mar27-03 05:57 PM
6 5,065
I have recently listened to the tapes of the "Journey through the Tenth Dimension" lecture, given by Michio Kaku in...
Apr5-09 11:20 PM
24 4,698
I've just talked with someone who informed me of a T.V. special, that dealt with the discovery of two planets, that...
Mar26-03 08:52 PM
3 2,696
My question pertains to atmosphere. Forgive me if it sounds stupid, or obvious, but I just don't know how atmospheres...
Jun18-03 07:16 AM
Mr. Robin Parsons
14 1,567
I've mentioned this before, the problems that might arise if the moon were to leave our orbit. However, I never really...
Dec13-03 05:14 PM
15 5,514
I think it's called "Edna"...anyway, it's named after an inuit goddess and it being called the 10th planet of our...
Mar19-04 04:42 PM
2 1,324
Forgive me, but I don't know the source of this. Has anyone heard anything about... ?
Jul27-04 11:40 AM
8 2,314
If blackholes are at the centre of each galaxy is it possible that all the matter from that paricular galaxy came from...
Nov26-06 11:07 AM
MadScientist 1000
24 3,118
I keep hearing about how this exotic Dark Matter is supposed to be evenly spread out across the universe... and that...
Feb9-08 04:01 PM
2 1,303
From everything I have read so far, we only know of Dark matter by means of gravitational inconsistencies. My question...
Jan3-09 09:33 PM
5 1,448
As I was helping my teenage kids with their science homework, I began to wonder if and how Einsteins theories on...
Apr3-09 03:26 PM
9 1,497
I wonder, Why is it so easy to imagine simple ETs, but so difficult to accept God(s) or God ETs as having been here...
Dec7-03 10:44 PM
3 1,057
Could the missing mass/dark matter be (migrating)? Black holes of various sizes? I have serious doubts if the missing...
Aug24-08 07:24 AM
5 1,849
Are there any satellite around the Moon on geostationary orbit?
Sep25-10 09:39 AM
1 3,479
1) A huge meteor can cause to destroy the civilization. But let assume that a comet pass by the Earth. Can a...
Sep28-10 08:13 AM
10 4,231
I've read the following statement: "Fractional instability of some pulsars is comparable with the one of atomic...
Dec18-10 11:01 PM
1 1,472
Are there any observations or estimations about asteorids outside our solar system?
May14-11 02:45 PM
6 1,411
I have to model an asteroid collision to the surface of the Earth In my model the infinite short stop is not...
May31-11 04:01 PM
23 4,659
Can we know something of the distribution of planets material in general? I mean, the percentage of solid, fluid,...
May25-11 10:18 AM
10 2,316
What is the crater size for an asteroid impact as a function of the asteroid diameter? Are there any estimated...
May16-11 02:07 PM
3 2,170
Are there any big difference of star distribution and H-atom distribution in the Milky Way on large scale (larger...
May25-11 01:25 AM
1 972
How many gamma photons are in the galaxy, and what can we know about the distribution? Which kind of process can...
May23-11 06:34 AM
1 1,226
What is the liftime of a solid planet compared to the life of its sun?
May23-11 10:25 PM
3 2,209
What is the ratio of asteroid impacts on the Mars to the same rate on the Earth? I think it depends on the diameter...
May24-11 05:18 PM
4 2,327
Hydrogen atoms are in ionised state in the Sun? So the electrons are in a separate gas state? If, yes, than what is...
May27-11 02:58 AM
5 1,675
Which is the asteroid size or mass which can destroy the Earth totally (I mean, breaking apart)?
May24-11 04:27 PM
8 2,056
Are there any usable simulation in the literature on the formation of a solar system? It is possible for example that...
May24-11 03:38 PM
1 2,757
what is the total mass of the heliosphere approximately? And its radial velocity?
May31-11 08:05 AM
1 1,460
How frequent are collisions in the ooort cloud? Are there any good reference in the literature about this topic?
Jun2-11 04:09 PM
2 2,595
I'm trying to figure out the formula adjustment to Newtonian mechanics using MOND but I'm getting stuck. Wikipedia...
May9-12 09:05 PM
31 3,978
This seems like it would be fairly complex as any material that is not in the suns would absorb photons and convert...
Aug18-12 05:13 AM
James Dwyer
5 2,453
Hi, my name is Mart Vabar. Wikipedia has this somewhat heavy construction: Physical insight on the process may...
Sep21-10 09:20 AM
1 1,609
Hi, I am a PhD candidate doing some research on origins of field theory but my background is in E-field and power...
Mar8-12 01:33 PM
9 2,221

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