Dwarf star Current Affairs - 2020
NASA’s Transiting Exoplanet Survey Satellite (TESS) recently discovered new dwarf star and planetary system named as TOI 270. It is located about 73 light years away from Earth, and in the constellation Pictor.
TOI 270 Planetary System
Its members include Dwarf star named TOI 270, which is 40 % smaller than the Sun in size and mass, and three exoplanets (planets outside solar system) that have been named TOI 270b, TOI 270c and TOI 270d. These three planets orbit their star every 3.4 days, 5.7 days, and 11.4 days respectively.
TOI 270b is innermost planet and is expected to be a rocky world about 25% bigger than Earth. It is not habitable (or within Goldilocks Zone) since it is located too close to star — about 13 times closer than our Solar System’s Mercury is from Sun. On other hand, TOI 270c and TOI 270 d are Neptune-like planets because their compositions are dominated by gases rather than rock.