The faraway exoplanet could help provide answers as to why there are hardly any planets with twice the diameter of Earth.

Are we alone in the universe? While no one can say for sure, space scientists know where to start looking—exoplanets. An ...

An analysis of two decades of data from NASA's Hubble Space Telescope has provided fresh insights into the complex ...

Astronomers have discovered two new exoplanets that are similar to other worlds found in the Milky Way, but unlike any in our ...

New findings from the ALMA telescope have revealed that planets are born in much smaller protoplanetary disks than ...

So in some sense, alien worlds were not first discovered in the 1990s or even the 1980s. It took nearly a century to fully ...

Using the now-retired Kepler space telescope, astronomers have discovered that larger planets grow up in more turbulent homes ...

Many protoplanetary disks in which new planets are formed are much smaller than thought. Using the Atacama Large ...

What if water and hydrogen don’t stay separated inside planets like Earth and Neptune? New research from UCLA and Princeton ...

Young, close-orbiting exoplanets known as sub-Neptunes may form farther from their stars and migrate inward or lose their ...

A new classification scheme may help us better understand planet formation — including the history of our own family of worlds.

More than 60 years after the first debunked discovery of a planet orbiting Barnard’s Star, the closest single-star system to ...