Ring of stars at 7 o-clock from the Galaxie

Comments and questions about the APOD on the main view screen.
Dennis Ross
Asternaut
Posts: 3
Joined: Wed Mar 15, 2006 3:32 am
Location: Mentor, Ohio

Ring of stars at 7 o-clock from the Galaxie

Post by Dennis Ross » Wed Mar 15, 2006 3:39 am

Is it possibly a gravity lens effect?
Thank you for the daily Astronomy information and beautiful pictures. :lol:

William Roeder
Ensign
Posts: 59
Joined: Thu Jun 16, 2005 3:46 pm

Post by William Roeder » Wed Mar 15, 2006 4:26 pm


cknowlto
Asternaut
Posts: 1
Joined: Fri Mar 17, 2006 7:52 pm

Post by cknowlto » Fri Mar 17, 2006 8:26 pm

Has anyone posted a satisfactory explaination for this? It appears to be a gravity lens, but I would have thought that such a nifty effect would have been noted in the text.

It _could_ be an asterism, but hey, what do I know. :D

User avatar
Pete
Science Officer
Posts: 145
Joined: Sun Jan 01, 2006 8:46 pm
AKA: Long John LeBone
Location: Toronto, ON

Post by Pete » Fri Mar 17, 2006 10:58 pm

IANAA, but my explanation: coincidence. I can find even more elaborate patterns in the holes found in the ceiling material of school buildings.

fastartceetoo
Ensign
Posts: 20
Joined: Wed Jan 25, 2006 6:04 pm

Post by fastartceetoo » Fri Mar 17, 2006 11:17 pm

I'm sure the ring of stars is a coincidence. It would be simple (for astrophysicists) to determine if it is lensing: the spectra of all the stars in the asterism would be identical. I'm sure if any astrophysicist ever thought that lensing was a possibility, a check would have been done long ago, and the caption would have said so.

Also, examples of lensing that I have seen tend to show circumferential smearing of the individual images; these images look sharp.

astroton
Science Officer
Posts: 106
Joined: Fri Dec 16, 2005 10:44 pm
Location: Sydney, Australia

Post by astroton » Fri Mar 17, 2006 11:49 pm

Is not having a central gravitational object, a necessity for gravitational lensing to take place? Looks more like a coincidence, as there are many stars in the field.
The Universe Is What You Think It Is. Every Thought Ever Thought Is True.

harry
G'day G'day G'day G'day
Posts: 2881
Joined: Fri Nov 18, 2005 8:04 am
Location: Sydney Australia

Post by harry » Sat Mar 18, 2006 6:51 am

see link

http://antwrp.gsfc.nasa.gov/apod/ap030127.html

making of holes, by jets from stars.
Harry : Smile and live another day.