When and where it will happen.

From 2026 to 2028, Earth will see a double eclipse cascade: three total solar eclipses and three annular solar eclipses.

For decades, Mercury was thought to be a simple, burned-out planet close to the Sun. NASA’s MESSENGER mission completely overturned that view, revealing unexpected chemistry, strange surface features, ...

A vast underground tunnel known as a lava tube, formed from ancient volcanic activity, has been discovered Venus.

During the Cold War, satellite reconnaissance was a powerful tool, albeit limited. High-resolution images ...

To initially fit the bears with the collar cams, the researchers tracked them through the snow by helicopter last May. Pruszenski fired tranquilizer darts from the air, with Vincent keeping track of ...

August brings the second and final solar eclipse of the year.

Six planets—including Venus, Jupiter, and Mercury—will line up in the sky. Here’s the best time to watch and where to find clear views.

On Tuesday, Feb. 17 , the Earth will witness an annular solar eclipse — commonly called a ring of fire .