description GJ 273 b Overview
GJ 273 b, also called Luyten b, is a super-Earth detected through radial-velocity measurements and announced in 2017. It orbits Luyten's Star, a nearby red dwarf approximately 12 light-years from Earth, and receives an amount of stellar energy that places it within commonly defined habitable-zone boundaries. Its actual surface conditions remain unknown because its atmosphere and detailed composition have not been established.
help GJ 273 b FAQ
Why is GJ 273 b also called Luyten b?
GJ 273 b is named after Luyten's Star, the red dwarf it orbits, so it is also called Luyten b. The planet was announced in 2017 after being detected with radial-velocity measurements.
Could GJ 273 b support liquid water?
Its orbit receives stellar energy within a commonly discussed habitable-zone range, which makes liquid water a possibility worth studying. That does not prove habitability because its atmosphere, surface, and climate are still unknown.
How far away is GJ 273 b?
GJ 273 b is about 12 light-years from Earth. Its host, Luyten's Star, is a nearby red dwarf rather than a Sun-like star.
How was GJ 273 b found?
Astronomers detected it by measuring the small back-and-forth motion that its gravity causes in Luyten's Star. This radial-velocity method can reveal a planet even when the planet does not pass directly in front of its star.
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