Humans evolved late in Earth history. While this timing inspired the conclusion that humanlike life is a cosmic improbability ...

Before arriving at the moon, the small satellite mission will use the gravity of the sun, Earth, and moon over several months ...

Although the occurrence climaxed on Jan. 21 with a conjunction—close alignment—of Saturn and Mercury, the planetary parade ...

Russia's state-owned Rosatom announced a prototype plasma engine which could speed up travel to other planets.

For most of history, the Moon was regarded as a mysterious and powerful object. Then scientists made it into a destination ...

The chances of an asteroid striking Earth within the next decade has doubled in a matter of weeks, according to NASA ...

NASA is making emergency preparations to deal with a ‘city-killing’ asteroid after the odds of it smashing into Earth ...

Near-Earth asteroid Bennu has a slim chance of colliding with Earth in 2182. If it does, the impact could trigger a global ...

When an electron dropped from a high-energy orbit to a lower-energy one, it gave out light with an energy equal to the ...

Astronauts Suni Williams, Butch Wilmore, Nick Hague, and Don Pettit joined The Excerpt to share the perspective gained from laps around the Earth.

The Znamya project had the potential to change the world. The BBC's Tomorrow's World reported on an experiment that was ...