For a brief, but exciting, time last year, Earth had two moons. A small asteroid lingered close to our planet in its orbit ...

because the illuminated side of the moon is facing away from Earth, toward the sun. The moon is also in the sky during the day, and without its Earth-facing side illuminated by the sun ...

A new study implies that in the past, moons in our solar system may have had rings just like planets do — deepening the ...

The larger moons of Pluto and Earth likely formed through a collisional process with Charon and our moon, respectively, ...

On Monday night you may have a chance to witness the moon obscuring the Red Planet at its brightest, as well as a comet’s ...

The moon will be opposite the sun Monday at 5:27 p.m. ET, according to NASA. This is when the moon reveals its full dayside to Earth. The moon will appear full for around three days. Mars won't ...