Using NASA's Transiting Exoplanet Survey Satellite (TESS), astronomers have discovered two new exoplanets around a young ...

Recent observations of the Kuiper Belt have revealed anomalies that suggest the presence of an undiscovered Neptune-sized ...

Astronomers have unexpectedly discovered the heaviest Neptune-like planet yet — one more than four times the mass of our solar system's Neptune — yet it remains a mystery how the world might have ...

Warm Neptune-size exoplanets are not nearly as common as super-Earths or hot Jupiters — and we are now closer to finding out why. Our galaxy apparently has a dearth of Neptune-size worlds that orbit ...

A new study rules out the existence of global oceans of water on Neptune-like planets such as K2-18b, finding their water ...

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 ...

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 ...

Mathematicians calculated where the planet might be based on its effects on Uranus, and astronomers searched for less than an hour before they found the Neptune. That was in 1846.

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. The ...

Assuming you’ve accepted Pluto’s demotion, Uranus and Neptune are the two planets in our Solar System farthest from Earth. That distance means humanity is still learning a lot about them. Some of ...