New research using NASA’s James Webb Space Telescope examines the maximum sizes of gas giant exoplanets, measuring chemical compositions and formation processes in the HR 8799 system.

Researchers using the Atacama Large Millimeter/submillimeter Array (ALMA) have, for the first time, achieved a precise size measurement of small dust particles around a young star through radio-wave ...

CAPE CANAVERAL, Fla. (AP/WISH) — For the first time ever, astronomers have discovered seven Earth-size planets orbiting a nearby star – and these new worlds could hold life. NASA made the announcement ...

LOS ANGELES — At least one in every four stars like the sun have planets about the size of the Earth circling them in very close orbits, according to the first direct measurement of the incidence of ...

Scientists with NASA announced they have discovered an Earth-sized planet that is likely rocky – and could be habitable. The planet, named TOI 700 e, is slightly smaller than Earth and orbits a red ...

Some of the planets in our Solar System are gigantic. But what if they got even bigger? Let’s go up the planetary size chart ...

NASA’s Kepler mission has discovered the first Earth-size planets orbiting a sun-like star outside our solar system. The planets, called Kepler-20e and Kepler-20f, are too close to their star to be in ...

A NASA mission has spotted an Earth-size exoplanet orbiting a small star about 100 light-years away. The planet, named TOI 700 e, is likely rocky and 95% the size of our world. The celestial body is ...