What is a planetary system?
Q: What is a planetary system?
A: A planetary system is a star with planets and other objects in orbit around it.
Q: How many exoplanets have been discovered so far?
A: As of the 21st century, 4,801 exoplanets in 3552 planetary systems have been discovered.
Q: What is the closest confirmed planetary system to Earth?
A: The closest confirmed planetary system to Earth is Gliese 832 at 14.8 light years away with one confirmed planet.
Q: What is the closest unconfirmed planetary system to Earth?
A: The closest unconfirmed planetary system to Earth is Alpha Centauri at 4.37 light years away with a planet of Earth mass.
Q: What is the closest multi-planet system to Earth?
A: The closest multi-planet system to Earth is Gliese 876 at 15.3 light years away with four confirmed planets.
Q: What region has the most potential for developing extraterrestrial life?
A: The habitable zone of planetary systems has the most potential for developing extraterrestrial life.
