Amateur astronomers discovered a new exoplanet

Mindy Sparks
January 12, 2019

This new catalyst has been named HD 21749b, and it has been found by NASA's new Transition Exoplanet Survey Satellite (TESS).

The mission's sensitive cameras also captured 100 short-lived changes - a lot of them likely stellar outbursts - in the same region of the sky.

A team of amateur and the two NASA interns have found a new super earth by using the space telescope of NASA they did it and they found that particularly bigger twice than the earth. It is located in a new world which is located within a habitable zone of the star.

During its time, Kepler discovered more than 2,600 planets - about 50 of which are believed to be the same size and temperature as Earth.

HD 21749B is orbiting a small star, and it takes 36 days to complete one revolution. "In contrast, the new planet, called Pi Mensae c, has a circular orbit close to the star, and these orbital differences will prove key to understanding how this unusual system formed".

At roughly 80 percent the mass and 90 percent the size of Earth, if confirmed, TOI 186.02 would be the very first Earth-sized planet discovered by TESS.

Meanwhile, 49 light-years away in the Indus constellation is the LHS 3884b, which orbits a cool M-dwarf star.


The new planet is about three times the size of earth but 23 times as massive. Due to its size, it comes in the sub-Neptune category, which means that it will be the first planet to be nearly Earth-sized, discovered by TESS.

"We know a lot about atmospheres of hot planets, but because it's very hard to find small planets that orbit farther from their stars, and are therefore cooler, we haven't been able to learn much about these smaller, cooler planets".

TESS's four cameras, designed and built by MKI and MIT's Lincoln Laboratory in Lexington, Massachusetts, spend almost a month monitoring each observing sector, a single swath of the sky measuring 24 by 96 degrees. The primary aim is to look for exoplanet transits, which occur when a planet passes in front of its host star as viewed from TESS's perspective.

TESS launched in April 2018 and has been constantly monitoring the sky sector by sector looking for 'momentary dips' in the light of about 200,000 nearby stars.

These early observations hold the key to understanding a class of supernovae that serve as an important yardstick for cosmological studies.

The space telescope Kepler has ceased activity, but the data of his research for a long time will be processed and become the cause of scientific discoveries.

"We eventually re-ran all data from the early campaigns through the modified software and then re-ran the planet search to get a list of candidates, but these candidates were never fully visually inspected", said Joshua Schlieder, an astrophysicist at NASA's Goddard Space Flight Center. "We're only halfway through TESS's first year of operations, and the data floodgates are just beginning to open", he said.

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