Search found 16 matches
- Tue Sep 27, 2005 2:08 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Sep 27: The Star Pillars of Sharpless 171
- Replies: 7
- Views: 4086
- Mon Sep 12, 2005 7:18 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Supernovae
- Replies: 1
- Views: 2177
Re: Supernovae
Tody's picture refers to two recent supernovae, SN1987A and SN1993J. It would appear that there are not many supernovae occuring. I find this very surprising, given the large number of large stars in a typical galaxy. Why are there not many more supernovae? Lots of Supernovae are discovered every y...
- Mon Sep 12, 2005 6:46 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: 47 tucanae
- Replies: 18
- Views: 8837
Re: 47 Tucanae
Since when did nature begin permitting such discrete fields of operation? Assuming the shape of the Milky Way is a result of gravity, then why didn't globular clusters get sucked into the malestrom centuries ago, like all of the water in my sink after I am done the dishes? This is not an anomaly of...
- Wed Sep 07, 2005 4:16 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Sept 6/2005 APOD
- Replies: 11
- Views: 4907
- Wed Sep 07, 2005 2:59 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Colliding Stars
- Replies: 41
- Views: 14321
Stars colliding is extremely rare due to two reasons: they are small compared to the interstellar distances, and they all move in the same general direction (in the galaxy). For stars to collide you'd need a direct hit. If the stars pass each other real close they will probably (depending on the rel...
- Wed Sep 07, 2005 2:52 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: 47 tucanae
- Replies: 18
- Views: 8837
Stars in globular clusters orbit around a common center of gravitaty. It's like a mini-galaxy in the real galaxy. They are kept apart due to individual directions of velocity, i.e. they orbit. It's the same with earth-moon system. They orbit a common center of gravity. The earth-sun also orbit a com...
- Tue Sep 06, 2005 3:07 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Albireo
- Replies: 2
- Views: 2378
- Mon Sep 05, 2005 4:13 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Apod Mirrors
- Replies: 4
- Views: 2627
- Mon Sep 05, 2005 4:01 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Origin of the "big bang" ??
- Replies: 7
- Views: 3801
This site is very good:
http://map.gsfc.nasa.gov/m_uni.html
And this recent article is also very good (atleast entertaining):
http://www.lbl.gov/Science-Articles/Arc ... nergy.html
http://map.gsfc.nasa.gov/m_uni.html
And this recent article is also very good (atleast entertaining):
http://www.lbl.gov/Science-Articles/Arc ... nergy.html
- Fri Jul 22, 2005 6:03 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: July 21, neutron stars
- Replies: 6
- Views: 4185
Well, I finally did what I should've done from the beginning - read the paper. It says in the introduction already that neutron stars not only accrete matter but also angular momentum from the companion star. There is no explanation of this in the paper, but they referred to another paper by D. Bhat...
- Fri Jul 22, 2005 9:05 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: July 21, neutron stars
- Replies: 6
- Views: 4185
Hehe, I guess it's rather big. I only started two months ago but I enjoy free storage and bandwidth (atleast for the time being). APOD just celebrated their 10th year online. Images vary from a few kilobytes to several megabytes. Also, the main site stores two versions of the images. Anyway, let's s...
- Fri Jul 22, 2005 7:56 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: July 21, neutron stars
- Replies: 6
- Views: 4185
Roy Kerr solved Einsteins equations to find that objects influence their surroundings, called frame dragging. Frame dragging was indeed observed not long ago , however, my question has nothing to do with frame dragging. There is no doubt that material in an accretion disk spirals inwards. It's the o...
- Thu Jul 21, 2005 6:11 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: July 21, neutron stars
- Replies: 6
- Views: 4185
July 21, neutron stars
On todays APOD and in this pressrelease , it is said that the accretion of matter on a neutron star spins it up. Can this be correct? An accretion disk lights up due to internal friction forces .The inner ring spins faster than the outer ring. The outer ring slowes the inner ring, creating the frict...
- Mon Jul 18, 2005 5:49 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Polaris
- Replies: 4
- Views: 4519
The Milky Way is a relatively thin disk of stars. Earths rotation axis points outwards from this disk. There might be stars located behind Polaris, or more aligned to the rotation axis, but I don't know of any such stars. However, you can be certain of finding a galaxy if you look hard enough. Take ...
- Mon Jul 18, 2005 5:03 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Polaris
- Replies: 4
- Views: 4519
- Thu Jun 16, 2005 2:00 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Happy anniversery!
- Replies: 1
- Views: 2823
Happy anniversery!
Happy anniversery to Nemiroff and Bonnell. May you continue for atleast another 10 years!
Regards,
Agnar Ødegård
Regards,
Agnar Ødegård