The International Space Station passed 3 times on Monday through the moon's penumbral shadow. Images of the moon's shadow on Earth, seen from space, acquired by ISS astronauts.
For 32 years, scientists have tracked the oxygen-depleted waters that appear each summer in the Gulf of Mexico. This year's dead zone is the biggest yet.
The August 21 total eclipse will last several hours. There will be many interesting things to look for. Bookmark this handy checklist of must-see events and effects, from eclipse gurus Fred Espenak and Mark Littmann.
Monday's total solar eclipse will give scientists a rare opportunity to study the lower regions of the sun’s corona. Here's what NASA scientists will be investigating.