thanks for the very helpful replies.
for the record, the three objects i referred to are located at:
(-207, 761)
(-818, 954)
(-962, 876)
where the coordinates are measured in pixels from the lower right corner of the full resolution (2302 x 1176) image.
Search found 3 matches
- Fri Nov 02, 2007 5:02 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Peculiar Arp87 - tidal effect, peculiar redshift? (1Nov2007)
- Replies: 9
- Views: 3566
- Fri Nov 02, 2007 6:49 am
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: what was that?
- Replies: 4
- Views: 3820
- Fri Nov 02, 2007 3:06 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Peculiar Arp87 - tidal effect, peculiar redshift? (1Nov2007)
- Replies: 9
- Views: 3566
peculiar red shifts in Peculiar Arp 87? (APOD 1 Nov 2007)
in the full resolution picture, there are three background galaxies in a line more-or-less tangent to the top of the face-on galaxy. i'd expect more-distant galaxies to be both smaller in apparent size and more red-shifted in colour. why then is the one on the right both bigger and redder than the o...