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This answer is based on the European Space Agency’s (ESA) research team.
We addressed several frequently asked questions about solar systems with Maximilian Guenther, ESA Project Scientist and mission representative of ESA’s Characterising Exoplanet Satellite (CHEOPS) project.
Guenther, Maximilian
CHEOPS Mission Representative, ESA Project Scientist
In addition to being a part of the research team for several other space– and ground-based telescopes, I am the European Space Agency’s (ESA) Project Scientist and Mission Representative for CHEOPS (the Characterising Exoplanets Satellite). Our search for Exoplanets the size of Earth orbiting tiny stars and the important topic of how stellar flares affect their habitability intrigue me. When I’m not looking for other worlds, I like to travel, explore our Planet, and go trekking, rock climbing, and dive diving.
Indeed, a large amount! If you had asked someone 30 years ago, they would have said, “We don’t know.” However, more than 5,000 planets—known as exoplanets—that orbit stars other than our sun have been discovered since then. We may also count almost 4,000 other solar systems since they regularly orbit the same star.
Yes, in several ways. To begin, exoplanets circle their stars in the same way as our planets (such as Earth and Mars) orbit our sun. Furthermore, the black hole at the heart of the Milky Way serves as the orbital center for our solar system and all others! Furthermore, some of these other solar systems have several stars (such as Tatooine!). These stars and their exoplanets then orbit each other in a rhythmical pattern.
That is the question of one million euros. We are just now beginning to examine the mechanisms that underpin the creation and evolution of other solar systems, as well as the lessons this may tell us about the history of our solar systems (and Earth!). We think many more stars if not all, have exoplanets surrounding them. According to the study, there are usually one or two exoplanets for every star, but this is merely the average! Some stars may have eight, but others may not.