Sunday, December 18, 2011

How Can Growing Galaxies Stay Silent?

How Can Growing Galaxies Stay Silent?:


The Andromeda Galaxy (M31) with minor satellite galaxy M32

The Andromeda Galaxy (M31) with minor satellite galaxy M32



Beginning around 2005, astronomers began discovering the presence of very large galaxies at a distance of around 10 billion lightyears. But while these galaxies were large, they didn’t appear to have a similarly large number of formed stars. Given that astronomers expect galaxies to grow through mergers and mergers tend to trigger star formation, the presence of such large, undeveloped galaxies seemed odd. How could galaxies grow so much, yet have so few stars?


(...)
Read the rest of How Can Growing Galaxies Stay Silent? (442 words)




© jvois for Universe Today, 2011. |
Permalink |
2 comments |
Add to
del.icio.us


Post tags: ,


Feed enhanced by Better Feed from Ozh



No comments:

Post a Comment