Tycho supernova remnant (SN 1572), combined X-ray and infrared image. This expanding cloud of hot gas and dust (green and yellow) formed following a type Ia supernova of a white dwarf star in 1572.
Off to rally in France for a week in a 1960s Fiat. I'm good with maps but #thankphysics for GPS which I suspect will make an appearance
05:01:03 PM November 18, 2011
from TweetDeck