Just decades after the first exoplanets were identified, our database of the distant worlds—monitored by the NASA Exoplanet Science Institute—has breached a new threshold. Now, astronomers have ...

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

Astronomers have discovered a significant “growth spurt” in a rogue planet outside of our solar system. The free-floating planet is currently consuming gas and dust from its surroundings at a rate of ...

So far, humanity has yet to find its first "exomoon"—a moon orbiting a planet outside of the solar system. But that hasn't been for lack of trying. According to a new paper by Thomas Winterhalder of ...

The official number of planets outside our solar system has reached 6,000, according to space scientists. NASA's tally of exoplanets does not include more than 8,000 additional candidate planets ...

A distant gas giant the size of 10 Jupiter planets is now the first planet outside Earth's solar system to be mapped in three dimension, a team of astronomers says. What's more, the researchers are ...

An artist's impression of the planetary system surrounding LHS 1903, a small red dwarf star cooler and dimmer than our Sun. (European Space Agency) (CN) — For decades, astronomers thought they had ...