For decades, astronomers have struggled to differentiate giant planets from brown dwarfs, a class of objects more massive ...

Kepler-51d is a giant, ultra-light “super-puff” planet wrapped in an unusually thick haze that’s blocking scientists from ...

With its beautiful rings, Saturn may be the most stunning planet in the solar system. It is the sixth planet from the sun and the second-largest planet in the solar system, after Jupiter. Though ...

A thick layer of haze around the ultra-low-density planet Kepler-51d likely obscures not only the strange planet's ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Sky-watchers who saw the Venus-Jupiter conjunction on ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. The moon's orbit isn't a ...

Most planets spin like tops around the sun. But one planet in the solar system breaks all the rules. Uranus is the weirdest ...

A six-planet parade — sometimes called a planetary alignment — will adorn the pre-sunrise morning sky on Friday, Aug. 22, with four of them visible to the naked eye. Venus, Jupiter and Saturn will be ...

Ah, Earth. We may not think about our planet on a day-to-day basis, but the world we live in is a pretty interesting place. The third rock from the Sun—and to this day, the only one with known ...

Six planets will align in the sky on Saturday, Feb. 28, in an event known as a "planet parade." Seeing all six planets will be challenging, as some will be close to the sun in bright twilight. Who’s ...

How far it is from the sun: 886 million miles (1.4 billion kilometers), on average How big it is: 72,400 miles (116,500 km) across, or almost 10 times the size of Earth. How many moons it has: At ...