Tonight … Moon, Mercury, Regulus rendezvous | | You'll need a clear sky and an unobstructed western horizon to catch the planet Mercury with the star Regulus, so near the sunset glare. But the moon - and bright planet Jupiter - will help! | | |
How to watch Shark Week | | This is a week of dueling shark-athons on television. A biologist advises viewers to take what they see with a large grain of sea salt. | | |
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Haze on Saturn's horizon | | Spectacular recent image from the Cassini spacecraft, now in its Grand Finale year around Saturn. | | |
