Published: Sat, January 12, 2019
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NASA's TESS Rounds Up its First Planets, Snares Far-flung Supernovae

NASA's TESS Rounds Up its First Planets, Snares Far-flung Supernovae

The nearby exoplanet's surface has a temperature of 300 degrees Fahrenheit, which scientists consider to be very cool for a planet so close to its star. The three planets discovered by TESS in its first three months of operation each have unique characteristics and orbits. Three times bigger than Earth and 23x heavy planet is placed in a sub-Neptune class.

Well if that substance really is a planet which would obviously be known after a bit of research then that is really going to be a big news for the scientists and the hopes of life over that planet are something beneficial in aspects like we could also be able to find some more instances to the situation based on the power of research and the speed of research like in how much time the scientists are going to reveal more about it. Unfortunately, the author's also point out the HD 21749b likely is not an ideal target for future atmospheric follow-ups with the upcoming James Webb Space Telescope (JWST). "But here we were lucky, and caught this one, and can now study it in more detail".

Estimated at about 1.9 times Earth's size, K2-288Bb is half the size of Neptune. Rather it is probably composed of dense gas.

Importantly, according to the research paper, which is available on the pre-print website arXiv.org, "the density of HD 21749b indicates it is likely surrounded by a substantial atmosphere".

The third - and possibly fourth - planets orbit HD 21749, a K-type star about 80 percent the Sun's mass and located 53 light-years away in the southern constellation Reticulum.

-The TESS was launched on April 18, 2018.


The incredible satellite has four onboard camera which focuses on each sector for 27 days before moving to the next one.

TESS is a NASA Astrophysics Explorer mission led and operated by MIT in Cambridge, Massachusetts, and managed by NASA's Goddard Space Flight Center.

TESS is now looking at the sky in the Southern Hemisphere and once compete will spin around to take in the Northern Hemisphere. This causes a regular dip in the measured brightness of the star that signals a planet's presence.

To confirm HD 21749b was indeed planets Dragomir referred to another dataset, collected by the High Accuracy Radial velocity Planet Searcher, or HARPS, a high-precision spectrograph installed on a large ground-based telescope in Chile.

By comparing the two datasets and some clever workarounds to fill in the gaps of the data set.

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