During the Age of Exploration, explorers relied on compasses to navigate the oceans and conquer the wilds, but they were ...

Uncover the mysteries of Mars' magnetic field, generated by a molten core, unlike Earth's solid core structure.

It presents evidence that the planet's magnetic field covered only its southern half. The resulting lopsided magnetic field would match the imprint we see today, said the study's lead author, Chi Yan, ...

Some lucky stargazers could have a double feature of the planet Venus this weekend. On Saturday and Sunday, the Earth will have an inferior conjunction (closest approach) with Venus, the sixth ...

The photo at left is an enhanced-color image of Neptune from the Hubble Space Telescope. At the right, that image is combined ...