For the first time in years, astronomers are seriously talking about adding a new member to the solar system’s planetary family. I’m not talking about reviving Pluto’s status, but about a potential ...

An international team of astronomers, co-led by researchers at the University of Galway, has made the unexpected discovery of a new planet. Detected at an early stage of formation around a young ...

HD 189733b may look like Earth’s evil twin, but it is far from the most extreme world in the universe. Astronomers have discovered several exoplanets that make even its deadly glass storms seem mild ...

Astronomers have spent years searching for a possible hidden giant planet far beyond Neptune. Unusual orbits among distant Kuiper Belt objects have fueled the Planet Nine theory, but recent ...