Friday, February 23, 2007.  Twenty years ago today, the light from a supernova in the Greater Magellanic Cloud galaxy reached the Earth, after a journey of 168,000 years.  I talk about that celestial phenomenon, and a little about why I find astronomy a particularly fascinating science.

The picture is an image of the gas cloud from Supernova 1987A, taken with the Hubble Space Telescope.

Today's episode music is "InnaFabledCity," by Jeff Shields.  Theme music composed and performed by Marc Rose.