Everyone's favorite dwarf planet, Pluto, was discovered just 95 years ago. Here's the story of how the once-ninth planet was ...

So in some sense, alien worlds were not first discovered in the 1990s or even the 1980s. It took nearly a century to fully ...

Scientists have been receiving X-ray signals from the Helix Nebula for decades, but now they believe it may hide a horrifying ...

This is particularly puzzling, as a vast majority of meteorites can be traced to some well-known parent body—whether that be ...

For the better part of a century, we believed there were nine planets in our solar system, with Pluto being the farthest from the sun. Since the discovery of more Pluto-sized dwarf planets, that ...

"As the large and bright discs are the easiest to observe, our previous view of the birth site of planets was biased." ...

Scientists estimate there are ~1 septillion (1 followed by 24 zeros) planets in the observable universe. This figure is based ...

Learn what planet rains molten iron and which planet has two moons like Tatooine in Star Wars.

The findings provide strong evidence that four giant exoplanets 130 light-years from Earth formed much like Jupiter and ...

Scientists found a bizarre new planet named Enaiposha, unlike any in our solar system. Learn why it's a mystery and how it’s ...

Only a few years ago, astronomers heralded the discovery of a rocky world circling the sun 's closest space neighbor, Proxima ...

At a distance of just over four light years, Proxima Centauri is our nearest stellar neighbor and is known to be a very ...