Where's the Dividing Line Between A Star and A Planet? Ask the JWST.

Webb Telescope Resolves Cosmic Identity Crisis Between Planets and Stars

Where do massive planets end and stars begin? It may come down to how they formed.

JWST Observations Redefine Just How Big A Planet Can Get – And It's Bigger Than We Thought

The line between a planet and star remains blurry, but it just shifted upwards.

Where's the Dividing Line Between A Star and A Planet? Ask the JWST.

It's obvious that Earth is a planet. It's obvious that the Sun is a star. But for substellar objects like brown dwarfs, it's not so clear. Researchers are using the JWST to find a stronger dividing line between star and planet that depends on how they formed.