When ice gets trapped on land as giant ice sheets, it causes the sea level to change, but it doesn’t change by the same ...

Summer arrives for northern observers as the Moon visits Venus, Uranus, and Mercury. Plus: globular cluster M15, double star ...

In the remote outer reaches of planetary systems, far beyond the orbit of known planets, enormous and mysterious worlds ...

The collapse of the world’s second-largest ice sheet would drown cities worldwide. Is that ice more vulnerable than we know?

This material causes Titania and Oberon to have darker and redder leading hemispheres. These outer moons effectively shield ...

How Many Planets Are There in the Solar System? There are 8 planets in our solar system. The planets orbit the Sun in ...

The moons that orbit Uranus are already known to have unusual characteristics: some are heavily cratered, others have ...