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

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

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

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

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

For example, you’ll need binoculars or a small telescope to see Uranus and Neptune—so, while the seven planets will be there, ...

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." ...

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.

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

Whenever planets are visible in the night sky, they always appear roughly along the same line. This path, known as the ...