Rotating Question Curious About Astronomy? Ask an Astronomer

How can we discern different galaxies/clusters along the same line of sight?

Thanks to the universe's expansion it is generally true that galaxies with different redshifts will have different distances from us.

Thus when we see multiple galaxies or clusters of galaxies in the same area of the sky we can distinguish which ones are related by comparing their distances through their redshift.

April 2006, Marko Krco (more by Marko Krco) (Like this Answer)

Still Curious?

Get More 'Curious?' with Our New PODCAST:

Related questions:

More questions about Galaxies: Previous | Next

How to ask a question:

If you have a follow-up question concerning the above subject, submit it here. If you have a question about another area of astronomy, find the topic you're interested in from the archive on our site menu, or go here for help.

Table 'curious.Referrers' doesn't existTable 'curious.Referrers' doesn't exist

URL: http://curious.astro.cornell.edu/question.php?number=697
This page has been accessed 13959 times since April 30, 2006.
Last modified: April 30, 2006 10:30:14 PM

Legal questions? See our copyright, disclaimer and privacy policy.
Ask an Astronomer is hosted by the Astronomy Department at Cornell University and is produced with PHP and MySQL.

Warning: Your browser is misbehaving! This page might look ugly. (Details)