description Gliese 876 b Overview
Gliese 876 b is a giant exoplanet orbiting Gliese 876, a nearby red-dwarf star roughly 15 light-years from Earth. Announced in 1998 from radial-velocity observations, it was among the earliest planets found around a low-mass main-sequence star. It is part of a multiplanet system whose giant planets exhibit strong orbital interactions, including a 2:1 mean-motion resonance between Gliese 876 b and Gliese 876 c.
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What is Gliese 876 b?
Gliese 876 b is a giant exoplanet that orbits the red dwarf star Gliese 876. It was among the earliest planets ever found around a low-mass main-sequence star.
How was Gliese 876 b discovered?
The planet was announced in 1998 based on radial-velocity observations of its host star. Astronomers used the Keck Observatory in Hawaii to measure the gravitational wobble caused by the planet.
How far away is the Gliese 876 system?
The red-dwarf star Gliese 876 is located relatively nearby in astronomical terms, roughly 15 light-years from Earth. This proximity made it an excellent target for early exoplanet detection.
Is Gliese 876 b the only planet in its system?
No, Gliese 876 b is actually part of a multiplanet system that includes at least three other confirmed exoplanets. The entire system is known to be in a complex orbital resonance.
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