See the videos: Sprites, Asteroids & ISON
Last night PBS Hawaii screened three great astronomy programs
If you missed any of them, the videos are available at:
The search for SPRITES, large-scale electrical discharges that occur high above thunderstorm clouds.
Will future asteroids trigger massive extinctions—or be mined for precious minerals? Features Ed Lu and an update on B612’s Sentinel Mission.
Comet of the Century.