Search found 11 matches
- Sun Sep 26, 2010 3:20 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Arp 188 and the Tadpoles Tidal Tail (2010 Sep 26)
- Replies: 32
- Views: 5656
Re: APOD: Arp 188 and the Tadpoles Tidal Tail (2010 Sep 26)
Given that they are more distant objects, I wonder: are we actually seeing redshift in the visible spectrum of these distant objects? Anybody know? I've seen that explanation in a caption once or many times, but I'm not qualified to confirm it's the correct one. Perhaps we're seeing the combined ef...
- Sun Sep 26, 2010 3:14 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Arp 188 and the Tadpoles Tidal Tail (2010 Sep 26)
- Replies: 32
- Views: 5656
Re: APOD: Arp 188 and the Tadpoles Tidal Tail (2010 Sep 26)
This is certainly a valid point, however, it doesn't apply universally to everything we call jets, c.f. Messier 87. Are you saying the M87 jet is not a particle stream? Well I guess I sort of am, but that's just sloppy expression from my part. The remark about Messier 87 was made to emphasize the f...
- Sun Sep 26, 2010 2:38 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Arp 188 and the Tadpoles Tidal Tail (2010 Sep 26)
- Replies: 32
- Views: 5656
Re: APOD: Arp 188 and the Tadpoles Tidal Tail (2010 Sep 26)
I believe it is a jet, but it could be a tidal tail too. Oh, Ann, Ann, Ann. 1) Jets shoot perpendicularly out of the center of galaxies not tangentially out of their arms and they usually have counter jets shooting out the opposite direction . 3) "The intruder galaxy itself can be seen through...
- Sun Sep 26, 2010 8:20 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Arp 188 and the Tadpoles Tidal Tail (2010 Sep 26)
- Replies: 32
- Views: 5656
Re: APOD: Arp 188 and the Tadpoles Tidal Tail (2010 Sep 26)
It's a striking image. Any idea if the nebulosity that seems to be centered and normal to the galactic plane of the largest background galaxy is a jet of some sort, or another gravitational tail / stream ?
- Sat Sep 19, 2009 10:12 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: NGC 3621: Far Beyond the Local Group (2009 September 19)
- Replies: 14
- Views: 3557
Re: NGC 3621: Far Beyond the Local Group (2009 September 19)
I suppose they were caused by a pencilDoes anybody have an idea how these are caused? Or did we find the Fleet of Worlds?
![Smile :)](./images/smilies/icon_smile.gif)
several places.
- Sat Aug 01, 2009 9:38 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Bubble in Cygnus (2008 Nov 13)
- Replies: 21
- Views: 5875
- Mon Jan 12, 2009 9:04 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Unusual Light Pillars Over Latvia (2009 Jan 12)
- Replies: 176
- Views: 188005
Re: Unusual Light Pillars Over Latvia (2009 January 12)
Look a lot like the newfound (Nov2008) (yet to be officially named AFAIK) 'Riikonen arcs':
http://www.ursa.fi/blogit/ta/index.php?cat=67
Culprit would be a flattened hexagonal ice crystal.
--
jussi
http://www.ursa.fi/blogit/ta/index.php?cat=67
Culprit would be a flattened hexagonal ice crystal.
--
jussi
- Thu Jan 08, 2009 9:15 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Jan 07, The Galactic Core in Infrared - Mr. Potato HEAD???
- Replies: 9
- Views: 2569
Re: 2009 Jan 07(The Galactic Core in Infrared) Saturn look-a
Can anyone tell me the names of more of the objects in the picture. Names of Stars, etc.... I am trying to identify the region of space in Starry Night. ftp://ftp.ncsa.uiuc.edu/cosmic/data/mark/GCSchematicscan2rot.gif ftp://ftp.ncsa.uiuc.edu/cosmic/galcenter/GC-P-BCD.med.jpg http://apod.nasa.gov/ap...
- Sun Jan 04, 2009 5:46 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Redshift - Motion or gravity? (APOD Jan-04, 2009)
- Replies: 31
- Views: 4799
Re: Redshift - Motion or gravity? (APOD Jan-04, 2009)
Well, quasars are (at their core) black holes, so of course there are very high strength gravitational fields present. But I think you are correct about the radiation source. Since the energy we see is actually coming from interactions well outside the event horizon, gravitational redshift is a sma...
- Tue Dec 16, 2008 9:37 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Bubble in Cygnus (2008 Nov 13)
- Replies: 21
- Views: 5875
Re: APOD 13th November 2008 - A bubble in Cygnus
So.
Was this a new find or did someone come up with a catalogue id?
Was this a new find or did someone come up with a catalogue id?
- Fri Nov 14, 2008 10:58 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Bubble in Cygnus (2008 Nov 13)
- Replies: 21
- Views: 5875
Re: APOD 13th November 2008 - A bubble in Cygnus
Some more images where it can be readily seen: http://www.astrosurf.com/brego-sky/nebulae/Crescent%20Nebula%20and%20neighbours.jpg (August 2008) http://www.btlguce.com/images/NMSImages/June2005/CressNMScolor.jpg (June 2005) http://dg-imaging.astrodon.com/gallery/display.cfm?imgID=85 (May 2007) http:...