Register to Post Thread

Astronomy & Astrophysics

- Celestial objects, space, and the physical universe as a whole.
RSS Feed Icon
Meta Thread / Thread Starter Last Post Replies Views
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
marcus
140 114,309
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 45,314
It seems to me, from my understanding of the Lagrange points, that a binary system with the appropriate mass ratio...
Nov28-11 10:39 AM
vanvlizr
1 2,151
What are the solar position and velocity vectors used for? A program I'm working with requires them to help construct...
Nov27-11 06:11 PM
solarblast
0 1,270
Hello I have been modeling the rotation curves of galaxies. Can help in calculating the rotation velocity for a thin...
Nov26-11 03:27 PM
Astaroth.
0 1,371
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
Aidyan
4 4,750
Hello, I am doing a very brief presentation for school on gravitational radiation and wanted to include a figure...
Nov25-11 10:27 PM
teroenza
3 2,368
Hi. A friend of mine, knowing about a probe (actually, 2) going out from the solar system, asked to me if we can...
Nov25-11 08:59 PM
davenn
11 3,907
With so much hype going around as to Betelgeuse turning into a supernovae in 2012, wonder whether it is possible to...
Nov25-11 02:59 PM
Jack21222
12 3,629
Hi there, I need to know why a singularity in astrophysics is called a singularity. I have a general idea about what...
Nov25-11 02:58 PM
Aidyan
14 3,351
My question is : if two stars have the same luminosity and temperature, do they have to be at the same mass and size?
Nov24-11 02:59 PM
robertrej
33 14,274
Hi To test the fitness of a certain model to some observational data I use ki_squared goodness of fit test. As you...
Nov24-11 06:42 AM
kderakhshani
0 1,229
please help me to solve this problem: Mars has a mean density less than the mean density of the Earth's mantle. How...
Nov23-11 07:04 PM
D H
1 2,409
When a massive star dies, you either get a neutron star, or a black hole. From my lecture, neutron star are...
Nov23-11 02:22 AM
twofish-quant
5 2,742
So I was watching this: http://www.youtube.com/watch?v=6_bWFHGaPWg which talks about the winding paradox of spiral...
Nov22-11 10:12 PM
Said Harbieh
6 3,514
And directly related to that: How can we be sure of the speed of light? I've been searching for a good answer as to...
Nov22-11 05:30 PM
Chronos
2 1,422
Hi, This is more complicated the more I consider all the variables. Klein defines a mineral as: A mineral is...
Nov22-11 03:16 AM
Said Harbieh
7 4,069
Can anyone tell me that how many dimensions are there in a black hole and which are the dimension
Nov22-11 02:24 AM
vinayjain
55 7,921
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
Drakkith
7 3,084
hi experts i know stellar evolution but how planet like earth is formed and how it has heavy elements does it is the...
Nov21-11 10:32 PM
Said Harbieh
2 1,955
Recently, I have read a old book with an article about two kids arguing the problem of Sun. One day, Confucius...
Nov21-11 06:17 PM
Raul Lai
5 2,800
Neutron stars are thought to be rotating in a way that their beems are seen as the pulses. The beems are not aligned...
Nov21-11 11:32 AM
pmghss
2 1,904
How much do we know about the singularity? It's properties, size, weight? I understand it contained all the matter...
Nov21-11 07:32 AM
Drakkith
2 1,550
Question: Why does the Sun and all of the planets except Mercury rotate in the same direction?
Nov21-11 07:22 AM
Drakkith
6 3,845
There aren't any electrons on a neutron star right? They all get squooshed into the protons to make the neutrons. Am I...
Nov21-11 06:46 AM
stevebd1
4 1,943
Extra Giant Planet May Have Dwelled in Our Solar System...
Nov20-11 11:06 AM
Astronuc
6 2,075
Just like the title says - with the meteor passing close by the Earth, gravity should alter the meteor's course. So...
Nov19-11 04:41 PM
tony873004
24 5,927
In the following web page with imbedded video, play and stop the video at the 30 second mark (the video is about 1/3...
Nov18-11 04:33 PM
Spinnor
8 2,124
what are the consequences of earth if our sun had somehow disappeared? can someone prove how long daylight on earth...
Nov17-11 05:41 PM
D H
30 9,138
Hi, I have a conceptual and mathematical question about gases in stars. The information we have from stars is due...
Nov16-11 11:28 AM
Ken G
3 2,973
There are a number of moons that seem to excite astrobiologists. Europa, Titan and Enceledus spring to mind. Are...
Nov16-11 10:06 AM
Ryan_m_b
3 2,004
Can anyone tell me the basics of Quasar? Note: Means that how it is created when there is only one dimension exists...
Nov14-11 06:56 PM
Drakkith
26 5,095
Can anyone direct me to some instructions that will tell me how I might be able to spot it? I know it may be difficult...
Nov14-11 04:38 AM
davenn
42 6,315
Can a variable star become a non variable one? Or viceversa, can a non variable, as it is (almost) the sun, become...
Nov13-11 03:09 AM
Aidyan
6 2,375
Hi, I recently stumbled upon this picture and I've absolutely loved it: ...
Nov12-11 08:50 PM
Vorde
0 1,081
On 11th December 1972, almost 40 years ago, man set foot on the moon for the last time. The Apollo 17 mission...
Nov12-11 06:13 PM
Grizzled
48 8,628
so planets orbit around a star and satellites orbit around a planet, is there any physical limitations that disallow...
Nov12-11 08:11 AM
tasp77
12 2,983
Hi I read in a paper that the enrgy saving in taking a payload to geostaionary orbit with a space elevator is...
Nov11-11 11:36 AM
DrStupid
19 3,916
I would like to know how many stars are within 150 light years of Earth. There must be a website somewhere that has...
Nov11-11 06:38 AM
Chronos
4 3,901
Have you ever experienced the wonder of the night sky? If yes, then you know that the universe has so much to offer...
Nov10-11 11:48 PM
Bobbywhy
1 2,215
Briefly into the big bang, matter anti-matter annihilation which lead to an excess of matter that is what is our...
Nov10-11 04:02 PM
Nabeshin
4 1,978
http://www.swinburne.edu.au/chancellery/mediacentre/media-centre/news/2011/10/natures-laws-may-vary-across-the-universe...
Nov10-11 09:47 AM
TrickyDicky
13 4,054

Register to Post Thread
Bookmark and Share

Display Options for Astronomy & Astrophysics Mentors
Showing threads 2201 to 2240 of 9621 Mentors : 2
 
Forum Tools Search this Forum
Search this Forum :
 
Advanced Search