Newly discovered 'super-Earth' orbits its star once every 2.4 days

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A "super-Earth" orbiting a red dwarf star has been discovered only 36 light years from Earth in the constellation of Serpens, according to a study published in the Astronomy & Astrophysics journal.

In a February 18 preprint version of the study available on the arXiv server, the planet's temperature is estimated to be around 556 degrees Celsius.

Known as GJ 740 b, the planet has a mass believed to be around three times that of Earth and a radius 1.4 times that of Earth's. This would make it only slightly smaller than Neptune.

The "super-Earth" orbits its star, known as GJ 740, in just 2.4 days. Its mass and orbital period suggest it is a rocky planet.

The data indicate a second planet may be orbiting the same star. It is believed to have a similar mass to Saturn and an orbital period estimated to be nine years.

RUNDOWN SHOWS:
1. GJ 740 b and its red dwarf star, GJ 740
2. The surface of GJ 740 b
3. Size comparison of GJ 740 b to Earth and Neptune
4. Orbital periods of GJ 740 b and sister planet
5. Description of two methods for finding planets
6. GJ 740 b's position in the Milky Way


VOICEOVER (in English):
"A 'super-Earth' orbiting a red dwarf star has been discovered only 36 light years from Earth, according to a study published in the Astronomy & Astrophysics journal."

"In a February 18 preprint version of the study available on the arXiv server, the planet's temperature is estimated to be around 556 degrees Celsius."

"Known as GJ 740 b, the planet has a mass believed to be around three times that of Earth and a radius 1.4 times that of Earth's. This would make it only slightly smaller than Neptune."

"The 'super-Earth' orbits its star, known as GJ 740, in just 2.4 days. Its mass and orbital period suggest it is a rocky planet."

"The data indicate a second planet may be orbiting the same star. It is believed to have a similar mass to Saturn and an orbital period estimated to be nine years."

"GJ 740 b lies in the constellation of Serpens."

"The Astronomy & Astrophysics study identifies two methods for discovering new planets outside of Earth's solar system."

"The transit method involves examining variations in the amount of light received from a star, caused by a planet passing between it and its observer."

"The radial velocity method involves examining a change in the color of the light around a star, caused by the pull of planets around it."


SOURCES: Instituto de Astrofísica de Canarias, Astronomy & Astrophysics, NASA, Business Insider
https://www.sciencedaily.com/releases/2021/04/210416131932.htm
http://dx.doi.org/10.1051/0004-6361/202040099
https://exoplanets.nasa.gov/exoplanet-catalog/7843/gj-740-b/
https://arxiv.org/pdf/2102.09441.pdf
https://www.businessinsider.in/science/space/news/new-super-earth-only-takes-2-4-days-to-complete-a-year/articleshow/82115255.cms
https://www.space.com/24903-kepler-space-telescope.html