Though the planets are always “aligned,” seeing more than four in the sky is more uncommon. February’s lineup is a chance to ...

Nearly one third of known exoplanets are enormous gas giants, similar to Jupiter or Saturn. But whereas our solar system ...

As we discussed last month, late January and early February will provide a stage for a Planet Parade, with six planets lining up in the night sky. On February 1, we should see the crescent moon in ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

NASA’s Juno mission to Jupiter’s moon Io has provided incredible data. A recent flyby revealed the most powerful volcanic event ever recorded on Io, the most volcanic world in our solar system.

"It's been such a puzzle that there was liquid water on Mars, because Mars is further from the sun, and also, the sun was ...

Astronomers have made a groundbreaking discovery in the WASP-132 system, finding two new planets that defy previous ...

This story was originally published by Grist. Sign up for Grist’s weekly newsletter here. Earth’s oceans caught a fever in ...

Scientists found an intriguing world in our galaxy.

When an exoplanet is discovered, scientists are quick to describe it and explain its properties. Now, we know of thousands of ...

Nasa's Juno spacecraft, orbiting Jupiter and its moons, has detected the most powerful volcanic activity in the Solar System.

In Earth's upper atmosphere, a fast-moving band of air called the jet stream blows with winds of more than 275 miles (442 km) ...