We all need some space sometimes—but it's harder to find than you might think. How far into our universe do we have to go to reach somewhere truly empty? Our first stop is the International Space ...

The discovery of exoplanets, planets outside of our solar system, has altered our perception of the universe and our role in it. Because they are small, dark, and under the strong light of their much ...

The molten planet, with an atmosphere rich in sulfur-bearing gases, is unlike anything astronomers have ever smelled.