In a Whirl
Thursday, November 29, 2012: A vortex swirls at the south pole of Saturn’s moon Titan stands out brightly at lower right in this photo. Cassini spacecraft, which took the photo on Aug. 31, 2012, will monitor the development of the south polar vortex to analyze seasonal changes on the ringed planet's largest moon.
— Tom Chao
Put on the Red Light
Friday, November 30, 2012: Giant, dense molecular cloud NGC 7000 lies in the heart of an active star formation region. Ultraviolet radiation from close newly formed massive stars ionizes the ambient atomic hydrogen and causes it to glow redly.
— Tom Chao