View Full Version : Discussion: Supernova, Before and After

2005-Jul-29, 04:09 PM
SUMMARY: When astronomers discover a supernova, it's too late to learn much about the star before it exploded. Even if astronomers have a picture of its home galaxy before the star went supernova, there are often too many stars in the area to pick out the progenitor star. An international team of astronomers got a lucky break when a supernova exploded in the relatively nearby Whirlpool Galaxy (M51) which was well photographed by Hubble. By comparing archived pictures with a new photo containing the supernova, they were able to find the exact star that exploded.

View full article (http://www.universetoday.com/am/publish/hubble_pinpoints_m51_supernova.html)

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2005-Jul-29, 04:17 PM
Most supernovas are too distant, or their progenitor stars too faint or in too crowded fields for astronomers to look back in historical sky photos

This omits the case where the progenitor is deeply embedded in a star forming region, and so is surrounded by opaque dust and gas.

2005-Jul-30, 05:51 PM
A good spot to read more on sn2005cs is at:


There are links to many images showing the sn.
The list grows daily.

A list of recent supernovae is at:
http://cfa-www.harvard.edu/iau/lists/Recen...Supernovae.html (http://cfa-www.harvard.edu/iau/lists/RecentSupernovae.html)