The leading explanation for all of these mysteries is known as the giant impact hypothesis. According to this story, when the ...

Out past Neptune are countless small icy and rocky bodies called Trans-Neptunian Objects (TNOs), and many of these have moons ...

For example, planetary moons can be split into two groups: regular moons ... He also writes Live Science's weekly Earth from space series.

it should be within approximately 90 percent of its closest distance to Earth. Blue Moon: A Blue Moon is the second Full Moon in a month that experiences two Full Moons. This phenomenon graces our ...