An asteroid big enough to wipe out a city is going to pass harmlessly between Earth and the moon's orbit this weekend, ...

DZ2 will pass at a distance of over 100,000 miles, less than half the distance between the Earth and the moon. It's about 160 ...

In the image you can also see the moon Io as a small orange circle ... unlike Earth and most other planets which orbit ...

This low-cost mission concept was designed by a team from the University of Sydney, Australia, and aims to look for ...

The icy moons of Jupiter and Saturn have unusual radar-scattering properties that may indicate the presence of alien life, ...