Jupiter is the largest planet in the solar system. It's about 11 times wider than Earth with an equatorial diameter of 88,846 ...

A powerful new observatory is the best hope yet for finding the elusive Planet 9, a large planet that some scientists say is ...

Our solar system has eight planets but in recent years, astronomers have theorised there could well be a ninth planet that's hiding in our solar system we've not been able to see yet.

and Vesta as full-fledged members of our planetary system. Today, when tens of thousands of minor planets have been discovered (most residing in an "asteroid belt" between Mars and Pluto), not ...

Our solar system is probably on the mild side compared ... mission called New Horizons that will send an unmanned probe past Pluto and its five known moons in July 2015. From there Stern hopes ...

Pluto is just 1,400 miles wide, about half the width of the U.S. "It definitely kind of broke the mold," van Belle said. "In our inner solar system, we have the four terrestrial rocky planets ...

The NASA boffins in white coats and thick-rimmed glasses have detected new signals that show the Oort cloud - the spooky shell of icy objects at the very edge of our solar system - might have ...

Almost 10 years ago, a NASA spacecraft was able to take several photos of Pluto, known for decades as a planet before it was ...

Pluto isn’t the only dwarf planet in our solar system's outer reaches. Now is an ideal time to look for the egg-shaped Haumea, says Abigail Beall ...

Comets are found in the outer reaches of our solar system, either in the Kuiper Belt just beyond the orbit of Pluto, or in the vast, mysterious Oort Cloud that may extend halfway to the nearest star.

Getty We're all affected by the planets in our solar system. Astrologically speaking ... Uranus, Neptune and Pluto. “Jupiter and Saturn are the only outer planets that the ancients were aware ...