The likely site of a new “gas giant planet” up to several times the mass of Jupiter, has been discovered by an international ...

Kepler-725c is roughly 2,472 light years from Earth, circling a G9V star in about 207.5 days. Its path brings it into a ...

It’s been 18 years since Pluto’s celestial status was called into question—yet the matter seems far from settled. We asked experts from both sides to make their case. This 2015 NASA image of ...

If all goes as planned in August, a startup called Starcloud from Redmond, Wash., will load a rocket bound for space with a ...

The company is developing a larger vehicle, named Helios, that could meaningfully improve the ability of SpaceX's Falcon 9 ...

Earth. It’s about 10 times more massive than Earth, and orbits in the habitable zone of a Sun-like star 2475 light-years away ...

The discovery of the exoplanet, a super-Earth called Kepler-735c, is all down to something called transit timing variations, ...

Satellite drift might not sound like a problem, but it’s a real-world issue that affects everything from your GPS to ...

SpaceX on Wednesday afternoon launched another batch of 27 Starlink satellites to low-Earth orbit from Vandenberg Space Force ...

A possible new dwarf planet has been discovered at the edge of our solar system, so far-flung that it takes around 25,000 ...

Under such scenarios, Mercury frequently crashes into the Sun or Venus, setting off cascading changes that alter the orbits ...

"Are we alone?" This ancient question has occupied humanity's mind for a long time. In 1995, the discovery of the first ...