Once completed, astronomers should have a healthy catalog of more than 10,000 exoplanets to sift through.
It remains unclear whether the new world, known as K2-288Bb, is rocky or gaseous.
First up is Pi Mensae c.
For comparison, the furthest manmade object form Earth, Voyager 1, is a mere 0.0018711857452558 light years away - 11 billion miles.
The new planet orbits the smaller of two cool stars in the stellar system called K2-288.
An artist's visualization of the exoplanet LHS 3884b.
Its size, three times that of Earth, makes it a sub-Neptune.
"The planet likely has a density of water, or a thick atmosphere", she added. It could be a water planet or have some other type of substantial atmosphere, ' explained Diana Dragomir, a Hubble Fellow at MKI and lead author of apaper on the planet's discovery.
An average temperature of 149 degress celsius on the planet's surface may seem rather hot, but given it's proximity to its sun it's actually considered quite cool.More news: Jaguar Land Rover 'to cut 5000 jobs' as losses continue
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Scientists said the system may hold an additional planet that is about the size of Earth that has an orbit of only eight days.
NASA believe they may have found a planet that could contain life. 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.
"It's the coolest planet we know of around a star this bright".
Launched in April 2018 for a two-year mission, Tess will survey almost the entire sky by monitoring and piecing together overlapping slices of the night sky.
"We've confirmed three planets so far, and there are so many more that are just waiting for telescope and people time to be confirmed", Dragomir said. But that won't be the only thing TESS will see as it stares into the same parts of the sky for months at a time. The satellite will spend the first year surveying the sky in the Southern Hemisphere, before swiveling around to take in the Northern Hemisphere sky.
Astronomers also received data of dozens of short-lived events in space and managed to capture images of six supernovae.
Stay tuned for more news from TESS! They determined that they should be able to find the signal again, in TESS's "sector 3" data - which they succeeded in doing.
Those first three days of data were ignored, and errors were corrected in the rest of the data gathered.
The pair were working as interns with Joshua Schlieder, an astrophysicist at NASA's Goddard Space Flight Center in Greenbelt, Maryland, at the time.