Titan's shadow will fall on Saturn in the early hours of Sept. 20, one day before the world shines at opposition in Earth's ...

Earth has a number of mini-moons and quasi-moons. Mini-moons are objects that orbit our planet. But they make for fickle fans: They tend to swing around Earth for only a matter of months. One example ...

Apophis will zoom safely past the Earth closer than the orbits of geosynchronous satellites on April 13, 2029. As well as the ...