An curved arrow pointing right. Mercury only comes between Earth and the Sun about 13 times every century. The last time this happened was in 2006. This rare event will occur again this Monday ...

The faraway exoplanet could help provide answers as to why there are hardly any planets with twice the diameter of Earth.

Our planet's closest and brightest neighbor will pass approximately between the Earth and sun this week, in what's called an ...

This celestial event happens roughly every 19 months due to the differences in Venus’s and Earth’s orbits. Can I see Venus’s transit with the naked eye? No, the event is nearly impossible to observe ...