The shape of a planet's orbit is one of its fundamental properties, along with its size and distance from its host star.

With a sun more than 4.5 billion years old, our solar system is considered "middle-aged," and the pictures of what it might ...

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

It is being called a "planetary parade" as seven planets are expected to be seen in the Earth's night sky on Friday, ...

A stunning planet parade is now visible in the night sky. A planet parade is when several of our solar system's planets are ...

A stunning photo of a "parade of planets", shows Mars, Jupiter, Uranus, Saturn, Venus, Neptune, and Mercury in alignment from ...

Everybody loves a parade. Most people who live in chillier climes aren’t exactly rejoicing when February rolls around — but ...

After Friday's spectacle, a "planet parade" of this size won't appear in the night sky for several years, experts say.

An advanced imaging system developed at the University of Arizona boasts a shape-shifting mirror that delivers observing ...

On Feb. 28, seven planets—Mars, Jupiter, Uranus, Venus, Neptune, Mercury, and Saturn—will all grace the early evening sky.

An alignment of seven planets will be visible in Friday's evening sky. Here's when and where to view the celestial phenomenon ...

A spectacular solar display will be seen on Friday, Feb. 28, as seven planets will be visible through binoculars, a telescope or even the naked eye during the evening's full "planet parade." ...