Search found 144 matches
- Wed Sep 26, 2007 2:28 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Pangea Ultima: Earth in 250 Million Years? (APOD 22 Sep 07)
- Replies: 58
- Views: 17523
Intertnet. If the earth has become less dense, then yes it would affect the gravity at the surface of the earth. It would be slightly less. But it would not affect how the earth's gravity pulls on the moon or any such other force, only the force on the surface of the earth. But I would be at a loss ...
- Mon Sep 24, 2007 10:34 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Pangea Ultima: Earth in 250 Million Years? (APOD 22 Sep 07)
- Replies: 58
- Views: 17523
- Mon Sep 24, 2007 4:40 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Pangea Ultima: Earth in 250 Million Years? (APOD 22 Sep 07)
- Replies: 58
- Views: 17523
- Sun Sep 23, 2007 8:03 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Pangea Ultima: Earth in 250 Million Years? (APOD 22 Sep 07)
- Replies: 58
- Views: 17523
- Sun Sep 23, 2007 5:03 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Pangea Ultima: Earth in 250 Million Years? (APOD 22 Sep 07)
- Replies: 58
- Views: 17523
You could start by asking just how much the earth is expanding per year in this theory. Assuming exponential growth, I calculated it out to an increase in circumference of 37 cm per year. In 10 years, it should have increased 3.7 meters. If this theory is true, then this increase in size should be n...
- Fri Sep 21, 2007 12:39 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Deneb a supergiant? (APOD 20 Sep 2007)
- Replies: 1
- Views: 1366
Like Betelguese and Rigel, Deneb has to be massively bright in order to be one of our brightest stars here. Betelguese is 400 plus or minus 100 ly away, Rigel is 800 +- 200 ly, and deneb is 3000 +- 1000 or so. In contrast, Sirius, the brightest star, is 8.6 light years away. So deneb, in order to be...
- Sun Sep 16, 2007 5:56 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Space walk - forbidden directions? (APOD 16 Sep 2007)
- Replies: 22
- Views: 8091
- Wed Sep 12, 2007 10:17 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Scorpio/Scorpius (APOD 11 Sep 2007)
- Replies: 12
- Views: 5870
Re: Position of Jupiter
Jupiter moves quite slowly: pretty close to Antares for the whole of 2007. The precise position of Jupiter among the background stars suggests the APOD was taken around the beginning of August, at the end of the retrograde motion. Good. But being 42 degrees north, I really only see Scorpius during ...
- Tue Sep 11, 2007 10:45 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Scorpio/Scorpius (APOD 11 Sep 2007)
- Replies: 12
- Views: 5870
I would like to point out something interesting about this picture. Antares is usually the brightest object in scorpius. to our naked eye, it is a red pulsating star, positioned right about the heart of the scorpion. It took me a few moments to find, but Antares is actually the bright Yellow Star in...
- Thu Sep 06, 2007 10:31 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: hubble
- Replies: 65
- Views: 14946
That's a better question that you give yourself credit for. First off, that star as we are viewing it now, we see light that was created 12.7 billion years ago, and the object was 12.7 billion light years away. Funny enough, I have no idea just how far it is away at this exact moment. And so the qua...
- Tue Aug 07, 2007 3:06 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Old Faithful Below A Yellowstone Sky (APOD 07 Aug 2007)
- Replies: 11
- Views: 4551
- Tue Jul 31, 2007 1:40 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: LASER beam (APOD 31 July 2007)
- Replies: 21
- Views: 8226
- Mon Jul 30, 2007 4:25 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: four suns of HD 98800 (APOD 30 July 2007)
- Replies: 8
- Views: 3132
- Mon Jul 30, 2007 4:20 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: four suns of HD 98800 (APOD 30 July 2007)
- Replies: 8
- Views: 3132
If you get out far enough on the orbit, the two stars act as one point mass. And if the dust pattern is as far out as the picture shows, it could very well be similar to a circular dust ring. It might have eddys, but would be generally circular. It would not be circular, however, if the other pair o...
- Sat Jul 28, 2007 3:44 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Tidal Tail of NGC 3628 (2007 Jul 27)
- Replies: 19
- Views: 6319
- Fri Jul 20, 2007 6:01 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Is the moon gray or is the picture colorized (20 July 2007)
- Replies: 30
- Views: 10703
- Tue Jul 10, 2007 1:36 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: The most distant Sun (APOD 9 July 2007)
- Replies: 10
- Views: 3945
- Tue Jul 10, 2007 12:01 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Shuttle Ferry (APOD 08 July 2007)
- Replies: 19
- Views: 7253
- Sat Jul 07, 2007 1:02 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: ngc2903 (APOD 06 July 2007)
- Replies: 13
- Views: 5135
- Fri Jun 29, 2007 1:34 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: 'Cat's Eye Wide and Deep' (APOD 29 June 2007)
- Replies: 5
- Views: 2865
- Thu Jun 28, 2007 2:11 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Neon Saturn (APOD 27 June 2007)
- Replies: 9
- Views: 3714
- Tue Jun 26, 2007 10:27 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: All the colors of the sun (APOD 24 June 2007)
- Replies: 21
- Views: 7469
As far as I know, a light ray or wave can have any amplitude and frequency. The problem is that if we get an amplitude too large or small, we have no equipment to measure it anymore. Same is true with the frequency. Any light wave can also be called a light ray. Gamma rays refer to a specific group ...
- Mon Jun 25, 2007 2:28 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: All the colors of the sun (APOD 24 June 2007)
- Replies: 21
- Views: 7469
Green dominance would probably not directly affect the plant evolution, I believe. Notice how plants are green? That is because they reflect green light and absorb the rest. They use Red, Yellow, Cyan and Blue to make their sugar and not the green color. Although it is a good thing that our eyes can...
- Wed Jun 20, 2007 2:08 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Eris, Sun, Dysnomia (APOD 19 Jun 2007)
- Replies: 21
- Views: 12139
- Tue Jun 19, 2007 11:11 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Eris, Sun, Dysnomia (APOD 19 Jun 2007)
- Replies: 21
- Views: 12139