The term "other star systems" refers to multiple star systems that are not our own solar system, which consists of the Sun and its planets. Full definition
Until now, scientists were uncertain whether these molecules would be found in the atmospheres of large, extremely hot planets in other star systems. (sciencedaily.com)
Extraterrestrial intelligent (ETI) civilizations may choose to pursue astronomy and search for planets orbiting other star systems and may also choose to follow - up on some of these targets by deploying their own remote exploratory spacecraft. (haqqmisra.net)
With a roll of your mouse's scroll wheel, you zoom out to see your star system in the context of dozens of other star systems. (science.sciencemag.org)