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

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

Another finding was how dramatically the planets varied in brightness over just three years. The team discovered that PDS 70 ...

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

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

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

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

Beginning around sunset, Saturn will be situated closest to the horizon, followed by Mercury, Venus, Jupiter and Mars higher ...

Seven planets will line up for a rare "planetary parade" today (Feb. 28) and you can watch it live online, beginning at 12:00 ...

Mercury, Venus, Mars, Jupiter, Saturn, Neptune and Uranus could be visible, but not all can be seen by the naked eye.

Seven planets will be briefly “visible” in the evening sky Friday night, but the best chance to see as many as four planets ...