Astronomers have picked up evidence of an Earth-sized world, distinct from the previously hypothesised Planet Nine and Planet ...

A model of a solar system first and foremost with a small projector built in, the Science Can Solar System Planetary Projector is a great educational tool for kids.

From the scorching surface of Mercury to the icy edges of Neptune, our planetary neighborhood is full of wonders. The order ...

The new image, which shows Earth along with an even smaller point of light coming from the moon, harkens back to Carl Sagan's ...

The Hubble Space Telescope has captured the best picture yet of a high-speed comet visiting our solar system from another ...

Is there a massive undiscovered planet on the outer reaches of the Solar System? The idea has been around since before the discovery of Pluto in the 1930s. Labelled as planet X, prominent ...

Jupiter and Venus, the two brightest planets in our solar system, should be widely visible for much of August in the northern hemisphere.

Space The Hunt for ‘Planet Nine’: Why There Could Still Be Something Massive at the Edge of the Solar System The mystery of Planet Nine is far from solved. Here's what we know.

Jupiter and Venus, the two brightest planets in our solar system, should be widely visible for much of August in Florida and the United States.

CAPE CANAVERAL, Fla. -- The Hubble Space Telescope has captured the best picture yet of a high-speed comet visiting our solar system from another star.