Charts showing how to spot them on August 25, 2017, plus an explanation of Jupiter's movement in front of the stars, as this outer planet and Earth both orbit the sun.
There was only one part of Earth where you could catch the International Space Station crossing the sun's face during the August 21 solar eclipse. These guys saw it, and created this video.
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.