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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
17 38,652
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
139 89,117
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
499 147,279
We often have questions about what telescope an aspiring amateur astronomer should buy. The "correct" answer can be...
Apr9-14 07:52 AM
234 80,836
Hi everyone Use this topic for posts about ongoing/upcoming stargazing events (e.g., comets, eclipses,...
Apr14-14 07:08 AM
282 104,730
an example of a globular clusters, what method should be used to calculate the root mean square radius of it? thanks...
Jan5-10 05:31 PM
1 2,801
Friday Febury 20th, 2009. NASA's Fermi telescope has spotted an massive and gigantic explosion in space which is...
Jan5-10 08:13 PM
21 4,577
Possibly habitable planet Gliese 581 d is said to be (at a minimum) 7x the mass of the Earth... but what would the...
Jan6-10 01:05 AM
19 9,911
I know this is a very elementary question, but I was never quite able understand why there was a bottom limit to what...
Jan9-10 12:39 AM
2 1,890
when two neutron stars collide, do they creat both a balck hole and release gamma rays or does it happen in stages?
Jan9-10 10:28 AM
9 3,684
I need to convert the intensity, 130 counts per pixel into magnitudes per sq arc second. I have been given the radius...
Jan9-10 11:20 PM
1 1,822
I read on another forum that during or after the huge tsunami that hit in 2004, that supposedly aurora borealis was...
Jan12-10 11:14 PM
7 10,178
Hi all, Iím an amateur astrophotographer, and while I was I was shooting frames just this morning (approx 5.50GMT,...
Jan13-10 06:53 PM
4 2,224
The moon moves away from the earth 3,8 cm per year. In the past the velocity has been gradually increased. I have...
Jan13-10 11:02 PM
33 28,668
I read this notion in the media frequently, and before you write me off as a dimwit, I realize that on earth today,...
Jan14-10 03:17 AM
4 1,479
Apparently, during a Martian winter, sand particles can get stuck together and frozen carbon dioxide will cover them...
Jan14-10 09:46 AM
2 1,997
In papers presented this week to the American Astronomical Society, Andrea Schmidt and John Singleton of Los Alamos...
Jan14-10 09:48 PM
Bob S
2 2,132
Regarding the stars in the sky at night, I have read a lot of times about the "false" image we get from it. Mainly due...
Jan14-10 11:33 PM
3 1,016
Hi, I was just wondering why some of the older Hubble pictures have a staircase effect on them? Any help would be...
Jan15-10 08:46 AM
3 1,938
I've been thinking about the following possibility. It might interest asteroid scientist. Were an asteroid in just...
Jan15-10 12:33 PM
0 1,122
Does anyone have any samples images from 7x50, 15x70, and 25x100 binoculars as pointed towards objects in space? I'd...
Jan16-10 07:15 PM
Count Iblis
20 3,043
I'm playing devil's advocate here. Why are we bothering with extrasolar planets? (Kepler mission) Why is it so...
Jan17-10 11:32 PM
14 2,303
What do you mean by 'multi-dimensional'?
Jan18-10 02:45 AM
8 2,045
I always asked myself about how does information works in the cosmos. I read an article were some scientist told that...
Jan19-10 11:10 PM
5 1,555
There are many speculations according to which there are certain changes taking place in the earth's gravitational...
Jan20-10 08:29 AM
7 1,841
Do you think dark matter and dark energy actually exist or have we just got the theory of gravity completely wrong but...
Jan21-10 11:53 PM
8 1,999
Physicists claim that the universe is a ball of galaxies that exploded from a single point in space with a Big Bang....
Jan22-10 03:00 PM
24 3,683
I'm just curious about one thing. Is it possible to make or create an artificial black hole?
Jan22-10 04:32 PM
Frame Dragger
18 2,882
What is the nature of the spectrum of electromagnetic radiation at a fractional radius of 08 inside the sun? My...
Jan23-10 11:53 PM
0 1,359
Lately I've watched a couple of YouTube clips showing various journeys through the universe, starting at Earth and...
Jan24-10 01:02 AM
4 1,643
I have two questions I cannot figure out: How is declination measured in the celestial sphere, in comparison with...
Jan25-10 12:50 PM
1 2,318
Hello.. Can someone tell me what sources in the Universe produce anti-matter? Do black-holes, stars? stellar...
Jan26-10 02:53 PM
6 1,874
Greetings, community. I'd like to ask a very simple question about gravity and the bending of spacetime. What would...
Jan27-10 10:04 PM
capri debris
12 1,926
Why are tides stronger at the new moon for a few months and then it changes back to having tides stronger at the full...
Jan28-10 03:12 PM
3 2,070
Does anyone know how long SOHO and ACE took to get to the L1 lagrangian point. It is in average 1.496 million km away,...
Jan29-10 07:42 AM
5 2,045
Hi Every picture I see on the internet depicts it brighter than the galaxy as a whole. Now I know that when a...
Jan29-10 09:52 AM
11 3,769
hi friends............. i m doing my in mech engg from ism dhanbad can anyone please suggest some research...
Jan31-10 10:14 AM
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Hi guys! I am planning to buy a telescope for a descent price. You see I'm totally amature and buying this telescope...
Feb1-10 12:02 AM
The legend
16 2,366
Ok in Part two of this lab found here ...
Feb1-10 05:19 PM
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So, I have a relatively small (6") Orion Dobsonian with a 25mm and 7.5mm Plossl eyepieces and live in a somewhat light...
Feb2-10 04:52 PM
4 3,034
As the title says, just seen this Video...
Feb3-10 12:08 AM
Ivan Seeking
10 3,976
Hello! I recently purchased a basic 6-inch Equatorial Reflector telescope. I bought it because I loved doing astronomy...
Feb3-10 01:25 PM
4 1,917
Is there anyway we can determine if Betelgeuse has gone supernova earlier this month? (theoretically speaking)
Feb3-10 03:03 PM
2 2,702
NASA may have captured an image of the aftermath of an asteroid-asteroid collision. Interesting pictures here. ...
Feb3-10 04:25 PM
1 1,230
Hey hey! I'm doing a project on detecting very low electromagnetic frequencies and was curious if anyone new the...
Feb3-10 05:37 PM
6 1,431

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