This once-in-a-generation shift is a pivotal power play in a saga that will unfold in the years and decades to come.

In Earth's upper atmosphere, a fast-moving band of air called the jet stream blows with winds of more than 275 miles (442 km) ...

Data collected by NASA's InSight lander suggest that ancient internal processes are responsible for the "Martian dichotomy" ...

High radiation during a time of frenzied star formation in the Milky Way left one stellar population with few chances to form planets, a study reports.

Six planets are set to align Tuesday evening, four of which will be visible to the naked eye, according to astronomers. NASA ...

Trump is pulling America out of the Paris Agreement, leaving the U.S. as the only major emitter not part of the treaty. It's ...

In his prepared remarks, Trump, a longtime backer of U.S.-led space exploration and exploitation, singled out Mars and left ...

Six planets will be in alignment this weekend, with four of them shining bright in one sweeping view. What to know about the ...

Venus and Saturn are currently in conjunction, meaning the planets appear close together in the night sky from Earth. These ...