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- 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
140 114,292
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 45,313
Possible exit points from this universe to another, or maybe collection points for energy to be saved and reassigned...
Mar8-09 12:18 PM
Ultrastar 1
2 1,263
Hey guys! So I'm looking at this textbook that attempts to describe to me how to get kepler's first law describing a...
Dec1-11 04:15 PM
11 2,833
I'm rather new here so please forgive me if this is answered somewhere else, but I was unable to find it while...
Aug17-14 08:54 PM
1 429
Hey I have a project about dark energy. Part of it is that I need to make some kind of homework problem with this...
Apr11-11 07:52 PM
1 879
Might ancient mid-latitude Mar's ice be covalently bonded? Would 1-2 billion year old ice have much greater density...
Jun7-10 01:16 PM
brother time
1 1,065
Core Drop As previously described, might one drop a 10x10x10 ft cement cube at 15-20 ft from Gulf of Mexico oil/gas...
Jul16-10 04:52 AM
1 1,914
Our multi-stellar system? Most stars form in multiples. Where are our sister stars? All of such sisters should be...
Sep4-10 11:09 PM
Vanadium 50
9 2,225
Voyager 1 launched in 1977 is ~10^10 miles out, near heliopause. Continuing at it's current velocity (3x 10^8 mph),...
Sep9-10 06:55 PM
1 1,471
Perhaps the recent silica found on the Moon highlands resulted from the extreme conditions of temperature and pressure...
Sep17-10 02:11 AM
1 1,095
At least 3 million years are required to form a geological strata (of say 7 ft?). What remanents of a culture...
Apr3-11 11:58 PM
12 3,047
Would it seem reasonable that so-called ‘hot jupiters’ are in resonance i.e. have a stable orbit? If one utilized our...
May6-11 05:41 PM
4 1,711
Is mass, angular momentum, and charge sufficient for black hole characterization? Or is also entropy, and hence...
May17-11 03:28 PM
3 1,208
Would it seem reasonable that so-called ‘hot jupiters’ are in resonance i.e. have a stable orbit? If one utilized our...
May20-11 03:40 PM
0 655
Hipparcus indicates that our supposed closest star alpha centuari is 742 marcs parallax, which corresponds to about...
May21-11 01:32 PM
2 2,090
Jet propelled Black Holes by ion engine? Might asymmetry of jets for BH, together with Newton’s Third Law, result in...
Jun13-11 07:23 PM
5 1,421
How far away can the oxygen signature in our atmosphere be detected? Indicative of photosynthesis. How far away can...
Sep5-11 12:54 AM
6 2,291
How far away is the Oort comet cloud? 1000 AU or 10,000 AU? c=10^10 cm/sec. for 10^8 sec/yr., gives 10^18 cm/lyr....
Nov26-11 09:21 AM
4 4,749
Hi all, I am nearing the start of my final year at university and part of that year is a large research project on...
Jun13-14 10:37 AM
4 1,619
Hi all, For my second year project at university, I have collected and analysed 21cm data of the Milky Way (MW). I...
Mar19-14 09:19 AM
0 597
Hello everybody, I'm trying to know, in a keplerian orbit, how to calculate the area of a swaped area; since the...
Aug24-14 01:54 PM
4 535
if u were at the center of a black hole which way would the gravity pull u. if it pulled u at all. what do u guys...
Jun20-09 07:48 AM
33 12,498
if light cannot escape a black hole then how do they emit stuff called hawking radiation.
Aug3-09 05:35 PM
7 1,709
Assuming that none of the energy in the universe was being converted into mass and vice versa , could the mass...
May16-10 09:53 PM
19 3,001
Lets say i had a black hole out in space , and then i had another black hole made out of anti-matter , and they came...
Jul16-10 10:58 AM
6 1,119
If a current loop does not radiate EM waves, then why does a pulsar? If the charge is evenly spread through the...
Dec19-11 10:46 PM
1 1,218
I'm trying to estimate the ratio of the flux of sunlight to moonlight (at full moon). What I'm interested in is if I'm...
Apr17-07 07:55 PM
2 2,582
Does all (i.e. 100%) of the energy generated in the Sun's core via nuclear fusion eventually escape out into space (as...
Jun13-11 09:19 AM
7 2,954
Hi, Recently started with astronomy with a basic 5 inch reflector, not motorised but interesting initial...
Nov16-12 05:48 AM
32 4,057
hey folks, i was wondering if anyone could give me help on a wee problem i have. using a distance of a star of...
May31-12 08:52 AM
8 1,955
hey, thought i would throw this problem out there.... if you have the luminosity of a red supergiant 400,000...
Jun1-12 05:56 AM
4 1,441
Hi guys, i'm not sure if this topic fits here, but can anyone tell me about the origin of planets? Like how is our...
Nov6-09 10:03 PM
8 1,297
Hi guys, me again, with two questions. Just saw a documentation about supernova, when supernova happens, a huge amount...
Nov11-09 10:58 AM
6 1,677
there was a singularity, what made it expand i so confused
Jan6-10 01:03 AM
9 3,668
Is there are 1:1 ratio of matter and energy in the universe?
Mar7-08 07:34 PM
2 1,048
i met a brilliant scientist about a year ago he invented one very very important item that saved millions of lives ...
Apr16-12 04:30 PM
2 1,083
this is my first post-is there such a thing as an opposite of a supernova and what is hydrostatic equilibrium ...
Apr19-12 03:13 PM
24 3,646
do most astronomers agree that there should have been a supernova visible from earth during this period but it wasnt...
Apr17-12 06:07 PM
4 1,164
it is such a wierd object mysterious almost spiritual
Apr17-12 06:09 PM
6 1,734
Would appreciate any comments
Apr30-12 09:38 PM
9 1,794
Can anyone confirm the earth's spin axis direction with respect to the AXIS of rotation of the galactic center? (in...
Aug8-10 01:22 AM
6 13,797

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