Gliese9

Gliese 9 is a red dwarf star located approximately 19 light-years away from Earth in the constellation of Andromeda. It is part of the Gliese Catalogue of Nearby Stars, which lists stars within 25 parsecs (81.5 light-years) of the Sun. Gliese 9 is significantly smaller and cooler than the Sun, with a mass about one-third that of the Sun and a surface temperature of around 3,400 Kelvin. Its luminosity is only about 0.4% of the Sun's, making it a relatively faint star.

Gliese 9 is known to host at least one exoplanet, designated Gliese 9 b. This planet was discovered in 2009 and is a super-Earth, meaning it is larger than Earth but smaller than ice giants like Neptune. Gliese 9 b orbits its star at a distance of about 0.04 astronomical units (AU), completing one orbit in approximately 3.65 days. Its mass is estimated to be around 13 Earth masses, and it is likely to be a rocky planet with a dense atmosphere.

The discovery of Gliese 9 b has made Gliese 9 an important target for further study, as it provides valuable insights into the formation and characteristics of exoplanets around red dwarf stars. The star's proximity to Earth also makes it a promising candidate for future observations and potential habitability studies. However, the intense radiation and stellar activity of red dwarfs like Gliese 9 pose significant challenges for the habitability of any orbiting planets.