"What if our Moon had a twin? Seeing not just one, but two of these satellites in the night sky might be spectacular. Let's assume our second moon would be around 1, 000 km (620 miles) wide and ...

New research suggests volcanic activity reshaped the Moon's geology, resetting its apparent age to 4.35 billion years.

Early interactions with the Earth may have heated up the Moon and caused it to remelt, producing new lunar rocks and erasing ...

The moon may be older than some scientists thought, according to a new study. It suggests that rock samples from the Apollo ...

The substantial difference is in the illumination percentage of the side facing the Earth. In the new moon phase, this percentage is 0% and becomes 100% at Full moon, about 14 days later.

Only when the moon, Earth and the sun are perfectly aligned is the moon 100% full. And sometimes — once in a blue moon — the moon is full twice in a month (or four times in a season ...

(CNN) – The moon ... 100 million years older than planetary scientists thought. The moon has long been thought to have formed roughly 4.35 billion years ago after a Mars-sized object collided ...

The moon may have received a volcanic facelift, making it more than 100 million years older than ... between a collision between the newborn Earth and a Mars-size rock dubbed Theia, the last ...