The July new moon provides dark skies tonight to see Jupiter, Mars and more

Lava Tubes on the Moon Maintain Comfortable Room Temperatures Inside

Saturn’s rings are so much brighter than Jupiter's because they're made mostly of ice particles replenished by many small moons embedded in the rings. Jupiter’s dim, thin rings, by contrast, are made mostly of dust shed from a few small moons, and the large Galilean moons destroy any large rings.

New Set of Chemical Reactions Could Finally Explain How Life Started on Earth