TESS Current Affairs - 2019
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The Transiting Exoplanet Survey Satellite (TESS) Mission of NASA has discovered its first Earth-size alien world.
About the Discovery
- The planet, HD 21749c, is about 89 per cent of Earth’s diameter.
- The planet orbits HD 21749, a K-type star with about 70 per cent of the Sun’s mass located 53 light years away in the southern constellation Reticulum.
- HD 21749c is the second planet TESS has identified in the system.
- HD 21749c is the 10th confirmed planet discovered by TESS, and hundreds of additional candidates are now being studied.
- HD 21749c doesn’t seem to have good life-hosting potential as it circles its host star very tightly, completing one orbit every 7.8 Earth days, and is therefore probably quite hot.
TESS which was launched just about a year ago is already a game-changer in the planet-hunting business. TESS total tally is likely to end up topping that of Kepler has found about 70% of the 4,000 exoplanets discovered to date.
The National Aeronautics and Space Administration (NASA) of USA has discovered a new planet. It is the third new planet discovered by the NASA mission, Transiting Exoplanet Survey Satellite (TESS).
HD 21749b- New Planet
The salient features of the newly discovered planet are:
- The new planet HD 21749b is outside our solar system and orbits a dwarf star 53 light years away.
- HD 21749b orbits a bright star in the constellation Reticulum.
- It has the longest orbital period of all the three discoveries made by TESS.
- HD 21749b orbits its star in a relatively leisurely 36 days.
- It is predicted that the surface of the new planet is likely around 300 degrees Fahrenheit, which is relatively cool, given its proximity to its star, which is almost as bright as the sun.
Other planet discovered by TESS
The other two discoveries made by the TESS probe are Pi Mensae b and LHS 3844b. Pi Mensae b has an orbit of 6.3 days and LHS 3844b has an orbit of just 11 hours.
The Transiting Exoplanet Survey Satellite (TESS) mission of NASA is an explorer mission which is undertaking an all-sky survey to search for planets transiting nearby stars. The objective of the TESS mission is to discover planets smaller than Neptune that transit stars bright enough to enable follow-up spectroscopic observations that can provide planet masses and atmospheric compositions.