adjective. Being or originating outside the solar system.

In astronomy, situated outside of or beyond the solar system.

adjective. Of or originating outside the Solar System

adjective. Of or originating in a solar system other than Earth's

"Yet until the 1990s, with the discovery of a star that wobbled suggesting it was being orbited by a large object, there was no concrete evidence that any of these so-called extrasolar planets existed."

interstellar  

extragalactic  extraplanetary  extraterrestrial  solar  

amusement-park  aronnian  cloud-covered  colonizable  far-side