There’s something about comparing the sizes of unthinkably large objects that’s endlessly intriguing. Looking at a comparison of all the various sizes of stars in the universe, for example, makes for ...

New research suggests they could play a crucial role in the creation of planets themselves. At a conference in Helsinki, ...

A flurry of lintlike particles discovered swirling around a small, distant star could help explain how minuscule interstellar dust grains clump together to form planets, astronomers say. "We have seen ...

Four hundred light-years away, a world twice the size of Jupiter glows like a forge. Now, thanks to the James Webb Space Telescope, astronomers have charted that fiery planet in three dimensions — the ...

Astronomers have discovered an Earth-size planet that is showered with so much radiation, its atmosphere eroded away long ago, leaving it bare. Life as we know it can't exist on this blistering world, ...