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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
marcus
140 111,481
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 44,452
I am currently autodidacting the basics of astrophysics, and I of course came across the term specific intensity. The...
Y 01:10 PM
litup
4 273
As a teacher, I am trying to help students understand the scale of the universe. Using the analogy of sand as...
Y 11:52 AM
trumpettree
5 672
Disclaimer: I'm not a physicist I've never quite grasped interstellar gas clouds (i.e. the material for new stars)...
Y 06:27 AM
Dotini
21 6,234
Hello everybody! Extreme interferometers like Ligo, Virgo, Leo600, Tama300 try to detect gravitational waves...
Jul31-14 01:18 AM
Chronos
2 749
Calculating latitude at noon is easy: say I got ##73^o## on 6/20/2014 So, ##90^o-73^o=17^o## then...
Jul30-14 02:54 AM
z.js
11 4,103
I have seen some documanters,and I have talk with some people about this issue: "Did human go to Moon ?". Many...
Jul29-14 06:43 AM
Drakkith
2 364
hello, my name is shaad, i was wondering if both theories of spacial destruction (The Big Crunch and The Big Freeze)...
Jul29-14 02:54 AM
Drakkith
4 334
The hot side of Kepler-70b is immensely hot. It orbits a star 21.8 times brighter than the sun at a distance of just...
Jul28-14 08:57 PM
Drakkith
3 366
If Titan's hydrocarbon seas were seeded with tardigrades, would the tardigrades survive and thrive?
Jul28-14 11:14 AM
Mniazi
3 678
Is it possible to calculate the entire orbit of an interstellar piece of rock that has entered our solar system from...
Jul26-14 11:25 AM
Student100
8 1,004
I could not find a thread about this (and I hope I don't start a duplicate one :smile:). I got a mail from a friend...
Jul26-14 05:12 AM
DennisN
0 573
Hi fellas, I have taken white dwarf stars as my undergrad thesis choice, so I need some suggestion on good books on...
Jul25-14 01:17 PM
CygnusX-1
3 726
Hi guys this is my first post! I've been trying to find a plot of the atmospheric transmittance of Venus but I've had...
Jul25-14 11:34 AM
Nostalgia00
2 927
hi, please explain me how to define a luminosity function? what is meant by luminosity interval? and the last one ,...
Jul24-14 09:25 AM
clumps tim
2 646
Hello All, A curious person here would like to know if a planet gains gravitational force as it rotates around the...
Jul23-14 10:21 PM
Simon Bridge
3 872
Is the amount of Dark Matter in a Galaxy equal the amount of Matter consumed by all the Black Holes in that Galaxy?
Jul23-14 04:20 PM
mathman
3 921
As many are aware, the announced detection of primordial gravity waves by BICEP 2 was heavily criticized based on dust...
Jul22-14 02:43 PM
Student100
1 810
hi guys, I wonder if I have fully understood the Fermi Dirac statistics properly, but I have a question on it...
Jul22-14 06:45 AM
clumps tim
2 865
This is a thought experiment that just popped up in my head, please excuse any layman inaccuracies. Imagine the...
Jul21-14 05:51 PM
enorbet
8 2,480
I am currently researching about the behavior of dark matter and their possible characteristics, and I am needing the...
Jul21-14 05:40 PM
enorbet
3 1,815
It was estimated that the heat inside the core of the Sun inside around 15 000 000 C - this value is extremely...
Jul21-14 04:58 PM
Helios
2 1,155
I have a few questions about the nature of the universe. I'll start with the first question: What was the size of...
Jul21-14 09:12 AM
Rysiu
2 1,020
The IAU plans to name 305 exoplanets. Currently, organizations can make suggestions, in 2015 the public can vote on...
Jul19-14 11:12 PM
marcus
2 950
Currently being reported in the popular press is an interesting-looking missing light crisis. Everybody loves a good...
Jul19-14 08:05 AM
Jonathan Scott
7 2,934
When a photon loses a little bit of energy, its frequency lows a little. That is, it suffers a slight redshift. So,...
Jul18-14 10:57 AM
phinds
9 1,681
What's the way to convert n(r) to \rho(r) in case of a spherical cloud. n(r) is the column density, \rho(r) is...
Jul18-14 07:45 AM
Simon Bridge
1 1,024
Have a question i thought of regarding something in space, do objects float in space or are they sitting in a fixed...
Jul18-14 02:47 AM
Drakkith
2 1,036
hi guys, my first post... i was wondering if there is anyway of stopping a star from going supernova... my...
Jul18-14 02:04 AM
gtriafylos
3 1,484
If the satellites are spread out as a big baseline telescope? Or there are other problems that even that method cant...
Jul17-14 09:43 AM
dkotschessaa
10 1,813
dear friends, can I get a link to the original paper by Chandrashekhar where he derived the limit for white dwarf?...
Jul16-14 03:45 AM
clumps tim
3 1,704
I am using the C library that comes with the book Astronomical Algorithms by Jean Meeus...
Jul15-14 04:18 PM
.Scott
2 2,063
hi fellas, I have been working on Chandrashekhar limit, and I found a mass-radius relationship for the nonrelativistic...
Jul15-14 01:08 AM
cooper607
3 1,931
hi guys, I have been doing a research on white dwarf stars and chanrashekhar limit. I need to plot a graph for the...
Jul15-14 01:06 AM
cooper607
4 1,672
Hi all, I attached a picture of an integral that I need to evaluate and graph. It is a line of sight (l.o.s)...
Jul14-14 04:29 PM
mfb
3 2,124
ok, I can understand that we can see object billion light-year away because it took light a billion year of travelling...
Jul14-14 08:42 AM
phinds
10 2,657
Can we start planting trees on mars now? Considering that there are so many tree species on earth that lives in...
Jul13-14 07:08 PM
phinds
22 5,518
So at some point nuclear fusion in a star becomes unable to sustain the core against its own gravity pressure, then...
Jul12-14 06:45 AM
anorlunda
6 2,440
Let's imagine a stationary black hole and a fast moving object falling into BH. Let the momentum of the falling object...
Jul10-14 08:26 PM
Ookke
5 2,747
Hello, first post here. I'm trying to wrap my head around something here and I'm wondering if anyone can help. I've...
Jul10-14 04:33 PM
mfb
1 1,882
Joe Silk is one of the co-authors. One expects large voids in the distribution of galaxies because of the cobwebby way...
Jul9-14 10:22 PM
marcus
1 2,004

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