Earth's Moon: Formation, Composition and Orbit
Scientists say a giant impact knocked off the raw ingredients for the moon off the primitive molten Earth and into orbit.
The moon is about one-fourth as big as Earth, relatively large for a planet's satellite.
The half-dozen icy satellites may have been spawned by a merger of bigger bodies that created Saturn's huge moon Titan.
A researcher at the Southwest Research Institute has constructed a moon-making scenario in which an object 4 or 5 times the mass of Mars collided with young Earth. A Mars-sized impactor was previously predicted.
Two new studies bolster the theory that the moon formed after a giant impact between two planets.
Glass beads in moon rocks revealed a link to the sun.
Amateur astronomers Gianluca Masi and Francesca Nocentini created this brief video of asteroid 2012 TC4 as it approached a near-Earth flyby on October 8th, 2012. The asteroid will come closest on October 12.
The two brightest objects in the sky may be visible as you wait for your train or bus.
Tne 2012 supermoon puts a stunning spotlight on star trails over field of flowers.
The Moon likely formed 4.5 Billion years ago as a Mars-sized body smashed into Earth (so compositions are similar). Lunar tidal forces encouraged life to flourish in the oceans. The Moon absorbed many asteroid impacts that threatened Earth's life.
The proposed project is a joint effort of Europe and Russia.
With a pair of binoculars or a small telescope, many spectacular features can be spotted on the moon.
99% the diameter of Mercury but only a third of Mercury's mass, what lies beneath deep beneath Callisto's pockmarked surface may surprise you. And it's probably the best place to base future explorations of the Jupiter system.
See eye-popping photos of the 2012 supermoon, the biggest full moon of the year, from skywatches around the world.
The Slooh Space Camera will be webcasting live feeds from observatories around the world.
This month's full moon has traditionally helped farmers work late into the evening gathering their crop.
The largest public meteorite auction ever held opens in Manhattan in October.
Spectacular crescent moon hangs in night sky photo.
Many people are puzzled when they can't find Earth's nearest neighbor in the evening sky.