Our Sun’s outer atmosphere, the corona, is millions of degrees hotter than it should be, and no one knows why.

Mars is about half Earth’s size and roughly a tenth its mass — not really the sort of planet you’d expect to leave ...

When my colleagues and I send them out to explore our solar system, it's important for us to understand the 3D map of our ...

The night sky could soon lose some of its natural darkness if a controversial space project moves forward. Reflect Orbital, a ...

A company called Reflect Orbital wants to illuminate the Earth after sunset with orbital sky mirrors, raising alarm bells.

At 4:56 a.m. EST (0956 GMT) on Feb. 17, the moon will begin to turn the sun into an impressive "ring of fire" during an ...

In the bigger picture, "down" could be defined as being below the plane of the solar system, which is known as the ecliptic.

A Mars spacecraft launched from Cape Canaveral, Florida, has been AWOL. But NASA hasn't given up hope of restoring contact ...

What would happen when the Sun releases a burst of energy at the Earth and thousands and thousands of satellites are in the ...

New simulations show Mars plays a key role in shaping Earth’s long-term climate by influencing its orbit and axial tilt over hundreds of thousands to millions of years.

Explore how Google's Project Suncatcher aims to address AI's energy demands with solar-powered datacentres in low-earth orbit ...