Our planet's closest and brightest neighbor will pass approximately between the Earth and sun this week, in what's called an ...

Prior to 2040, the last planetary quintuplet occurred in the year 1186, and according to Uptain, records show that the close ...

We've known for over 30 years that there are other stellar systems in our galaxy, but we don't have any idea how many there ...

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

Venus has phases just like the moon. Before and after the conjunction, Venus looks like a thin crescent — though only ...

Pollard A quartet of Earth-like worlds, each about 20% to 30% the size of our planet, circle one of our closest ... orbiting ...

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 ...

Last year, astronomers announced that a planet orbits Barnard’s star. Now, researchers have confirmed the existence of three more.