Question: Name the planet around which early life is discovered recently?
(a) Barnard b
- In the 233rd meeting of the American Astronomical Society (AAS) in Seattle, Washington held on 10th January, 2019 it was disclosed that its new-found planet labeled Barnard b (GJ 699 b) have the potential to nurse primitive life.
- Barnard’s star is the nearest single star (and now the second-nearest star system) to our own sun at only six light-years away.
- Barnard’s star is a low-mass red dwarf star & only emits a fraction of the energy our sun puts out. Barnard’s Star is about 9 billion years old (twice as old as the sun).
- Barnard b is super-Earth exoplanet orbiting the legendary Barnard’s Star. It is about three times the mass of Earth and orbits the star every 233 days.
- The team of researchers also evaluated the amount of X-ray and ultraviolet radiation the star’s planet would receive at its distance of 0.4 astronomical units (1 astronomical unit (AU)=Distance between Earth-sun) to determine the effects on any atmosphere Barnard b might host.
- A young star like Barnard b rotates faster & emit more ultraviolet & X-Ray radiation as compared to when it is older.
- Currently, Barnard b only receives about 2 % the radiation Earth receives from the Sun, and is a cold world with a surface temperature of nearly -275 ℉ (-170 ℃).