Webb telescope discovers 6 rogue worlds. They didn't form the way you'd expect.

Sometimes, planets go rogue.

Scientists used the powerful James Webb Space Telescope to spot six of these rogue objects, which move through the cosmos untethered from any solar system. They're a little bigger than the gas giant Jupiter, and the discovery suggests these worlds formed similar to the way stars form — rather than how planets are usually created.

Astronomers have waited for years to harness the abilities of the Webb telescope, whose large mirror gathers bounties of distant...