One week ago, the MESSENGER spacecraft transmitted to Earth the first high-resolution image of Mercury by a spacecraft in over 30 years since the three Mercury flybys of Mariner 10 in 1974 and 1975.

Mercury, the first planet from the Sun - The Forgotten Planet. With the search for life beyond Earth primarily focusing on Mars and the rest of the solar system, it’s easy to forget about the small ...

Mercury doesn't give up its secrets easily. The smallest planet in our solar system is also one of the most extreme—a sun-scorched, metal-rich world with a puzzling magnetic field and lavas unlike ...

Of Interest: This high-resolution enhanced color view of Kuiper crater shows not just the bright rays that extend out from this relatively young crater but also the redder color of Kuiper’s ejecta ...

This week, Astronomy magazine Editor Emeritus Dave Eicher invites you to check out Mercury, which will be at its greatest ...

Far smaller and closer to the Sun than it should be, Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission arriving in 2026 might ...

NASA's Messenger spacecraft will make history Thursday when it becomes the first probe to orbit the planet Mercury. But it also promises to help solve a host of mysteries about the solar system's ...