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- Celestial objects, space, and the physical universe as a whole. Astrophotography and amateur astronomy are welcome!
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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 38,666
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.
Apr10-13 11:08 AM
marcus
139 89,150
astrophotography, photos Sticky Thread Pinned: Astrophotography photos ( 1 2 3 ... Last)
Looking for advice? Willing to share your expertise with other PF members? Brave enough to share & discuss your...
Dec12-13 08:47 PM
Astronomus
499 147,336
We often have questions about what telescope an aspiring amateur astronomer should buy. The "correct" answer can be...
Apr9-14 07:52 AM
DHF
234 80,902
Hi everyone Use this topic for posts about ongoing/upcoming stargazing events (e.g., comets, eclipses,...
Apr14-14 07:08 AM
Borg
282 104,767
This is related to a HW post I made over in the HW forum. I am stuck trying to find a more detailed formula for the...
Oct23-10 02:11 PM
Desmos
2 2,800
They actually did find some small amount of water in the Lcross ejecta plume....
Oct24-10 04:39 PM
chemisttree
2 1,797
u all might have heard of sun storms, the news abt which was recently flashed on approx all news channels.' I dont...
Oct25-10 06:56 AM
Nik_2213
4 1,537
I'm a high school physics teacher and my students are building a science payload to launch on a weather balloon. You...
Oct27-10 02:42 AM
Ich
2 3,653
Question: Before it collapsed in 1989, Green Bank's 300-foot diameter telescope mapped the sky in H I. What was its...
Oct27-10 03:37 AM
Chronos
2 2,770
First, these are not homework questions. I need to make a "quick" study guide (as to teach someone basics of...
Oct28-10 01:44 AM
Gaius Baltar
8 2,884
Hi people! Strange request but not having much luck in anything specific to what i'm doing, either that or i'm not...
Oct28-10 07:40 PM
RocketSci5KN
9 1,995
How do you calculate your position and speed in space? How many points of reference do you need? Thanks Chris
Oct29-10 08:32 AM
Phobos
2 1,166
Hypothetically if the moon suddenly explodes (reason irrelevant) how would that affect the earth's spin (chaotic spin...
Oct29-10 08:54 AM
Phobos
8 2,167
This should be very easy but I cant see what Im doing wrong... V_t=\mu .d where vt = tangential speed (in km/s) d...
Oct31-10 05:35 PM
Integral
2 2,821
Is it mathematically feasible that the moon is hollow? Many people say that the moon has been hollowed out, and...
Nov1-10 01:09 AM
Chronos
10 9,018
Would it be possible to send manned missions to, or colonize the gas giants? I'm talking about the actual planets, not...
Nov1-10 07:57 AM
Nik_2213
5 2,140
My question was piqued by this article: http://news.discovery.com/space/earth-like-planet-life.html The article...
Nov1-10 12:18 PM
Algr
7 2,990
Ok this does come from the movie "Contact" with jodie foster. Where she mintors space for aliens transmitting radio...
Nov2-10 11:09 AM
NobodySpecial
1 2,053
Hey guys, I was originally going to order the following telescope, but I found one at a local store, so if its as...
Nov2-10 04:40 PM
turbo
9 1,612
Little preface to this series of questions, I'm really into theoretical physics but I have very little astronomy...
Nov3-10 03:36 AM
twofish-quant
6 1,924
How it is possible to capture photographs of milky way. I mean just take a case that we can't take photos of earth...
Nov3-10 05:49 AM
rajatgl16
3 1,518
Why earth's orbit is elliptical rather than being perfectly circular
Nov3-10 07:20 AM
D H
7 2,846
hi, im new to the forum, i am 18 years old and i am really interested in astrophysics and cosmology. there is one...
Nov3-10 09:38 AM
Radrook
19 3,649
(This is regarding how the moon became apart of our orbit) Is it not possible that insted of the moon simply...
Nov3-10 04:41 PM
Silverhill
2 1,069
I dont know much about Astronomy or physics. But I am researching to write a fantasy book set in a historical age...
Nov3-10 04:47 PM
Silverhill
1 4,278
The discovery of Eris prompted the creation of the category "Dwarf Planet" for Pluto and some other objects. They...
Nov4-10 11:16 PM
Algr
11 1,536
Hey guys, Iv been looking for this, but cant seem to put it together. Mainly I am looking for images of the...
Nov6-10 05:50 AM
davenn
4 2,841
..are here Amazing (Credit NASA) http://i52.tinypic.com/2labqbo.jpg
Nov7-10 05:04 PM
WhoWee
4 1,392
I just thought I would ask on this forum because I was curious to see how the experts in the field feel about each...
Nov8-10 12:39 PM
turbo
2 20,067
I read that the distribution and proportion of dark matter to regular matter is different for regular-size galaxies...
Nov8-10 01:11 PM
Chimps
3 1,661
Is there any new on the new goldilocks planet and if there is water on it? also what website is good for following...
Nov10-10 09:58 AM
Ophiolite
4 1,389
Everything is on the same plane, and I was wondering why. I mean like, if you laid a reallllly flat and thin plate...
Nov10-10 10:06 AM
Ophiolite
5 4,665
I wonder is there a planetoid bigger than pluto in the solar system or is it possible that there could be a planet...
Nov10-10 10:09 AM
Ophiolite
6 3,205
Hi guys, Im just starting to get into viewing. I have a question about Mercury though. Can someone give me an...
Nov11-10 04:27 PM
NobodySpecial
1 1,539
I'm really stuck with this last question...im not quite sure where to start...any help would be greatly appreciated!...
Nov12-10 03:33 PM
qraal
2 3,689
ok il say this now im curious what would happen if you were able to bend the accretion disk and the ergosphere so that...
Nov13-10 08:25 AM
tiny-tim
1 1,334
Gliese 581 g, assuming it's real, is supposedly tidally locked being so close to its parent star. That makes sense. ...
Nov13-10 11:53 AM
Janus
5 3,868
Hello, I am working outside the world of science, and would love to get input. for a book I am working on I want...
Nov13-10 11:42 PM
Buckethead
2 974
Could one exist that size that we don't know about?
Nov15-10 10:36 AM
Nik_2213
2 1,116
I am kind of new to astronomy and I have a few questions.. I need to be able to determine an equation expressing...
Nov15-10 10:38 AM
farore
1 3,401
If a sun is giving off photons in every direction in space, does that not mean that all of empty space is full of...
Nov16-10 06:26 AM
Eyelegal
8 1,668
With an amateur telescope, (field of view of 2 degrees) what features can see you see in and around the andromeda...
Nov17-10 08:55 PM
Chronos
2 2,490
NYTimes.com, By DENNIS OVERBYE Published: November 17, 2010 "Allan Sandage, Astronomer, Dies at 84; Charted...
Nov17-10 09:02 PM
Chronos
1 1,192
I was thinking about how big the universe got after inflation occured. Then I thought about Hubble's parameter. Ho...
Nov17-10 10:28 PM
twofish-quant
3 1,959

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