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 ...

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

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

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

The orbit Venus takes around the sun results in an inferior conjunction as it transitions from appearing in the evening sky ...

Astronomers have confirmed the existence of four planets orbiting a star less than 6 light-years away with help from some of ...

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 ...

For centuries, humans have wondered if planets exist around other stars and dreamed of ... nor were they orbiting a star like the sun, but they were confirmed to exist. It was the first evidence ...

The search for habitable planets has taken a leap forward with new space telescopes probing exoplanet atmospheres for life.

Scientists already know that a planet must be in the “Goldilocks zone”—not too hot and not too cold—to have liquid water, a ...