The Solar System is vast, made up of eight planets, countless moons, and millions of asteroids, all orbiting the Sun. But like any territory, it has a boundary. This boundary is invisible, yet it ...

With the race for clean energy intensifying, scientists are revisiting an old idea: harvesting the Sun’s power from space ...

On the side of the Sun facing Earth, a giant coronal hole appeared in the shape of an enormous love heart, many times the ...

TRAPPIST-1e, 40 light-years away, may have an Earth-like atmosphere, raising hopes for habitability beyond our solar system.

A new NASA mission will capture images of Earth's invisible "halo," the faint light given off by our planet's outermost atmospheric layer, the exosphere, as it morphs and changes in response to the ...

Much as we may treasure and proclaim our independence, we actually live in a protective bubble called the heliosphere.

The brightest, best date for spotting Saturn is fast approaching. Here's how to see the ringed planet from Indiana.