The vernal equinox occurs as Mercury stands still in Pisces and several of Jupiter’s moons transit in the sky this week.

Nuclear pulse propulsion is a technology that would work. It was being developed in the 1960s. It was stopped because of the nuclear test ban treaty and ...

"It's like a game of billiards around the solar system, flying by a couple of planets at just the right angle and timing to ...

Americans will have to stay up late or get up really early this week to see the latest celestial event – a total lunar eclipse. The Sun, Earth, and Blood Moon will align on Thursday night and Friday ...

There's plenty more planet mayhem to come throughout the week. Today, the Moon enters its first quarter, which many will know ...

When a mudflat crumbles on Earth, or an ice sheet splinters on one of Jupiter's moons (Europa), or an ancient lakebed breaks ...

The ringed gas giant Saturn has officially replaced Jupiter as the planet in our solar system with the most moons. The ...

Their discovery showed that even tucked away in our innards – in the walls of our stomachs, subjected to vinegar-like pH ...

NASA’s Europa Clipper is using Mars and Earth’s gravity to travel efficiently to Jupiter. The spacecraft will study Europa’s ...

Heads up, skywatchers: a planet alignment is up for viewing this weekend, with Mercury, Venus, Jupiter, and Mars all visible ...

This Friday, all seven planets will be in the night sky for a brief period. Join the cosmic spectacle and learn where to look ...

NASA's Europa Clipper is about to use Mars' gravitational pull to slingshot itself towards Jupiter's smallest moon later this ...