The work is described in a new paper, ‘The Moon-forming impactor Theia originated from the inner Solar System’, published in the journal Science.

Hundreds of people who love the little planet that was dissed, gather every year in the Arizona town where Pluto was discovered. They celebrate scientific discovery, history and our solar system’s ...

For over 50 years, Cornell has made astronomical contributions in the ongoing efforts to explore and understand the mysterious inner workings of Earth’s rust-colored neighbor, Mars. In honor of these ...

New reconstructions of 540 million years of climate history show the planet tumbling between icehouse and hothouse states, revealing how rare and vulnerable our temperate moment is. Some 4 billion ...