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Astronomy & Astrophysics

- 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
140 114,352
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 45,327
Magnetic Field of the Sun will Flip I believe some time in November if I am not mistaken. It happens about once every...
Sep4-09 07:49 AM
8 5,113
Can anyone point me to some reference as to how magnetic fields are produced in the inter stella medium please.
Apr5-05 11:59 AM
5 1,052
The magnetic fields of several planets in our solar system are from what I've read caused by electric currents - does...
Dec20-07 01:08 AM
4 1,243
It is a known fact that neutron stars and pulsars, remnants of super nova explosions, have very strong magnetic...
Apr8-03 04:59 PM
6 3,000
Hello again PF, I've been doing some light reading on different magnetic fields of different gas giants, and what was...
Jul10-11 03:29 AM
1 1,606
Pardon this completely naive question. I am wondering why there are net magnetic fields on the Sun. Isn't there an...
Feb16-10 02:50 AM
Frame Dragger
3 1,192
A spacecraft whose bulk consists of magnetic fluid shaped by an internal magnetic field has several advantages over...
Apr1-03 11:16 AM
Loren Booda
16 3,964 Magnetic reconnection is the process whereby magnetic field...
Jan24-09 06:39 AM
8 2,604
What are the thoughts about using a magnetic sail propelled by a powerful alpha emitter (e.g. polonium)? Imagine a 1kg...
Mar1-14 10:19 AM
16 2,943
Magnetic fields are present in space. Doesn’t Ampere-Maxwell law state this is a consequence of currents or changing...
Jun3-11 01:53 PM
7 3,084
Like the earth, do other planets have magnetism?
May6-08 12:25 AM
10 2,994
Hi, I don't have a solid background in astrophysics. I need some help. Jupiter's magnetosphere is elongated by the...
Jan9-08 07:01 PM
3 4,466
Dear all, I'm new here and I'm sorry if my problem has already been discussed anywhere else. I have some problems...
Feb22-11 03:09 AM
0 1,577
I was asked in a problem to guess how Greek astronomers used 2 telescopes (and no CCDs) to determine that stars with...
Sep28-05 09:24 PM
4 1,019
I didn't realize there are different magnitude systems. I have been doing an experiment on CCD extragalactic...
Jan2-10 02:27 PM
1 1,144
Can anyone help me get my head around this one? A star with a parallax angle of pi = 10 millisecs and has apparant...
Mar10-08 07:40 PM
1 1,405
Straight forward questions that's been bugging me a little. Why do most stars lie on the main sequence whilst others...
May21-05 06:10 AM
7 2,813
Hello. The question states that We have a globular cluster with total mass 10^6 times sun's mass. Assume that the...
Oct27-09 08:24 PM
3 2,180 ...
Jan15-13 03:55 PM
8 1,727
Hi, This is my first post and I am truly perplexed. I am reading principia in a class and it seems that newton has...
Feb28-06 08:55 AM
1 2,093
Nov6-03 12:15 AM
15 2,232 Anyone with some inside information?
Feb21-06 01:25 PM
7 2,637
This kind of science makes it kind of hard to believe we're alone. Those are galaxies.
Oct7-07 07:03 PM
2 1,980
I was reading some article about some scientists who were able to 'read' some sort of cosmic background radiation and...
Jan13-04 01:49 AM
3 1,563
You must have heard the recent news that the first woman ever, Maryam Mirzakhani, just won the Fields Medal. ...
Aug15-14 05:33 AM
Simon Bridge
1 598
I heard about a technique where mercury or some other liquid is spun in a dish until it assumes a parabolic shape....
Feb3-04 11:24 PM
1 1,554
I live in a very light polluted part of the country (NE) and I am unable to see any stars near the horizon but a lot...
Apr16-09 11:37 PM
3 1,236
Why would you want to send men? Why not a hundred more rovers.. They could do a LOT more and better explorations for a...
Dec13-06 08:55 PM
18 2,731 "Manhattanhenge – sometimes referred to as the Manhattan Solstice – is...
Oct25-11 06:38 AM
3 2,217
Does a manifold necessarily have a metric? Does a manifold without metric exist? If it exists, what is its name?
Nov20-07 02:03 PM
Chris Hillman
2 1,685
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
5 2,261
How would I get a Listing or a Map of All the Constellation Boundaries in Right Ascension and Declination.
Aug25-14 04:14 PM
2 382
Here's an interesting article on the first 'skylight' - opening to a possible underground lava tube or cavern -...
Oct31-09 12:12 AM
2 3,312
If Mars had 25% more mass would its orbit be further or closer to the sun?
Jul17-06 09:40 AM
28 2,673
I'm probably going to get flamed hard for this but, I just want to see what type of reaction I'd get. BUT, in leu of...
Jun29-08 07:26 PM
11 1,806
Recently I saw this in the news...any thoughts on this? jhd as joesmith
May29-11 09:34 AM
9 2,660
So often I see shows on TV discussing the seemingly inevitable terraforming of Mars by humans. These shows generally...
Dec11-11 01:16 PM
5 3,295
Hey Guys, Im just curious... can you show me the actual computations as when the next closest encounter of Mars and...
Aug29-06 10:14 PM
1 2,105
I hope this is not a duplicate topic, if it is, I apologize... I watched on science news the other night that Mars...
Jun18-03 06:00 PM
5 3,778
Hey there I just saw a show on Discovery about spacetravel, and a little question arose as the show ended: In the...
Mar10-04 08:37 PM
3 1,340

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