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...