Ever since its formation around 4.5 billion years ago, Earth's rotation has been gradually slowing down, and its days have ...

Astronomers from MIT have uncovered a dramatic celestial spectacle: a Mercury-sized exoplanet that is rapidly disintegrating ...

Astronomers discovered a planet that orbits its star so closely that its surface is being scorched into magma and vaporizing ...

A new Tatooine-like planet outside the solar system may orbit two failed stars, scientists reported Wednesday. Located about ...