BepiColombo is slowly uncovering more and more fun facts about Mercury as it continues its preliminary mission. One of the ...

Although Mercury was geologically active in its early days, today its surface appears almost completely static. This is why ...

Late last July, a University astrophysicist helped discover the smallest planet ever detected outside the solar system — without even seeing it. Using a planet-finding technique called "gravitational ...

Mercury, the smallest planet in the solar system, has spent billions of years quietly getting even smaller. Since its fiery beginnings 4.5 billion years ago, it has been steadily cooling and ...

Mercury stands stationary at 3 A.M. EDT amid the stars of Cancer. The solar system’s smallest planet will now start sliding westward, or retrograde, appearing to “fall” back toward the Sun as it moves ...

A team of astronomers has reached a major milestone in the search for Earthlike planets with the discovery of the smallest planet ever detected beyond our solar system. About seven and a half times as ...

As the planet closest to the Sun, Mercury has it rough. Not only is it the smallest planet in our solar system, but Mercury's crust is also fractured and sheared in several places. There are also ...

SEATTLE – NASA has discovered the smallest planet ever seen beyond our solar system – a rocky world just 1.4 times larger than Earth – using its planet-hunting Kepler observatory. The planet, called ...