There are a lot of worlds beyond the orbit of Neptune. Some are dwarf planets, while many others are much smaller rocks ...

Researchers use the Subaru Telescope in Hawaii to find a small object on the outer edge of the Solar System. Nicknamed “Ammonite,” researchers say it could provide more evidence to the ...

Over 437 light years away a planet called HAT-P-26b is orbiting a star that is twice the size of our own. It’s a type of planet known as a “warm Neptune” which means that it is roughly ...

Tour the universe from the Big Bang to planet Earth in this SPACE.com infographic series. Skip to main content. ... Uranus in 1781 and Neptune in 1846. ... For example, the edge of the ...

This image of the planet Uranus was taken by the spacecraft Voyager 2 in 1986. (Image credit: NASA/JPL-Caltech) Previously, scientists had suggested it was the methane of Neptune that makes that ...

In 2005 an object larger than Pluto was discovered in the Kuiper Belt. This discovery would call Pluto's planetary status into question and help create a new term, Dwarf Planet.

Observations of the Neptune-like exoplanet HAT-P-26b show that its ... the more heavy elements its atmosphere contains. Jupiter’s atmosphere has less heavy elements than Neptune’s, for example.

After Voyager 2 flew by Neptune in 1989, new calculations determined there was no Planet X. But three years ago, a disturbance was detected at the far reaches of the Solar System. Transcript ...

Target the planet through binoculars or a telescope and you’ll also see the much fainter glow of Neptune. The two planets won’t pass closer to each other under a dark sky until October 19, 2210.