Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission ...

We are now beginning to better understand exoplanets as against merely discovering them. These are the exotic worlds that ...

The Milky Way was once a textbook example of how a spiral galaxy should form and evolve. Now a wave of new observations and ...

A Carnegie-led team of astronomers detected the strongest evidence yet of an atmosphere around a rocky planet beyond our ...