Chilling animations depict the apocalyptic impact that “city-killer” asteroid YR4 2024 could have if it did hit Earth — while ...

Blue Ghost will spend the next 16 days in lunar orbit, if all goes to plan. It will conduct additional engine burns to circularize its path around Earth's nearest neighbor, then attempt a landing in ...

A new animation depicts that process with ... which pushes the moon outward and makes its orbit larger. That's why researchers look to the imprints of ancient ocean tides to determine how fast ...

In one orbit of about 29.5 days ... from full moon to new moon. At the bottom right corner, the animation also tracks the boundary of sunlight falling across the moon as it rotates.

This is called a new moon. As the Moon continues to orbit Earth we can see more and more of the lit side. At various stages in its orbit it is called a crescent moon, a quarter moon and a gibbous ...