Add Yahoo as a preferred source to see more of our stories on Google. An artist's illustration of a hot, Neptune-size alien planet. Warm Neptune-size exoplanets are not nearly as common as ...

The discovery of a Neptune-sized exoplanet around a massive star could explain why such planets are rarely found. When you purchase through links on our site, we may earn an affiliate commission. Here ...

Add Yahoo as a preferred source to see more of our stories on Google. Assuming you’ve accepted Pluto’s demotion, Uranus and Neptune are the two planets in our Solar System farthest from Earth. That ...

Water vapor has been detected in the atmosphere of a Neptune-size exoplanet about 150 light-years from Earth, according to research presented Thursday by astronomers at the University of Kansas.

A team working with data from the dearly departed Kepler space telescope has reported a possible moon orbiting an exoplanet some 5,000 light years away. It falls somewhere between the size of Earth ...

Scientists have identified a new kind of planet- an ‘ultrahot Neptune’, or a giant exoplanet that orbits its star 23 times closer than Mercury orbits our sun. Current estimates say that around 1 in ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Lying at the very outskirts of our solar system, the ice giant Neptune ...

"For planets the size of Jupiter or larger, the planet is massive enough to gravitationally hold on to its puffy atmosphere. As you move down to planets the size of Neptune, the atmosphere is still ...