After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the ...

When you get out past the planets of our solar system and keep going, you will eventually enter the Kuiper belt, which has ...

A new study suggests that the planet’s icy interior and liquid ocean could be insulated with a three-to-six-mile-thick layer ...

Avi Loeb's controversial claim that a recent fireball resulted from an interstellar object is taking a hammering.

Fastest Known Planetary System May Have Been Pushed by Our Galaxy’s Supermassive Black Hole ...

The best solar batteries keep the lights on during a power outage and shift energy consumption, making them a sensible ...

Our universe is full of mysterious sights and sounds. Explore some of our most frightful finds from past Halloweens.

But what if we tell you there are plenty of moons in our solar system that are as beautiful or even more marvellous as the ...

"Get a free What If Top 10 book when you sign up for our newsletter: Earth is the only life-supporting planet in our Solar ...

It would depend on a lot, say our readers, from how big it was to the route it took - but it could have significant ...

The Subaru Telescope has discovered new objects beyond the known Kuiper Belt, suggesting a more complex structure at the edge ...

A team led by researchers at MIT has discovered that a distant interstellar cloud contains an abundance of pyrene, a type of ...