NASA’s New Planet-Hunter Finds Its First Earth-Sized World And It’s ‘Potentially Habitable’

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Artist’s conception of HD 21749c, the first Earth-sized planet found by NASA’s Transiting Exoplanets Survey Satellite (TESS), as well as its sibling, HD 21749b, a warm sub-Neptune-sized world.

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Orbiting the K dwarf star HD 21749, the astronomers found HD 21749c, which takes about eight days to orbit the host star and is similar in size to Earth at 89% its diameter. A likely rocky world, it’s thought to have surface temperatures as high as 800°F /427°C. They also found HD 21749b, a warm sub-Neptune-sized world about 23 times Earth’s mass and a radius of about 2.7 times Earth’s, which orbits its host star every 36 days. That one was a bit of a surprise since TESS is not designed to detect planets that take longer than 10 days to orbit their star.

  • Publisher: Forbes
  • Date: 2019-04-15
  • Author: Jamie Carter
  • Twitter: @forbes
  • Citation: Web link (Read More)

Not to change the topic here:

NASA’s planet-hunter TESS finds its first earth

NASA’s planet-hunting spacecraft Transiting Exoplanet Survey Satellite (TESS) has discovered its first Earth-size world orbiting a star located about 53 light years away. The star, HD 21749a, also hosts at least one other world, a warm ‘sub-Neptune’ planet with a mass about 23 times that of Earth and a radius about 2.7 times larger. The new world is likely rocky and circles very close to its star, completing one orbit in just under eight days. The planet is likely very hot, with surface temperatures perhaps as high as 800 degrees F (427 degrees C).

“It’s so exciting that TESS, which launched just about a year ago, is already a game-changer in the planet-hunting business,” Johanna Teske, author of a study describing the planets and Hubble Postdoctoral Fellow at the Carnegie Institution for Science, said in a statement. “The spacecraft surveys the sky and we collaborate with the TESS follow-up community to flag potentially interesting targets for additional observations using ground-based telescopes and instruments.” The study was published in’The Astrophysical Journal Letters’on Monday.

  • Publisher:
  • Date: 2019-04-16T08:49:36+05:30
  • Twitter: @NewsNationTV
  • Citation: Web link (Read More)

NASA’s planet hunter finds Earth-sized planet 53 light

WASHINGTON: NASA’s plant-hunting spacecraft launched last year discovered an Earth-sized planet and a warm sub-Neptune-sized one in a nearby star system.

The host star of those two planets has about 80 percent of the mass of the Sun and is about 53 light-years distant from Earth.

The Transiting Exoplanet Survey Satellite (TESS), launched on April 18, 2018, is NASA’s latest satellite to hunt for planets outside our solar system.

It will monitor the brightness of more than 200,000 stars over a period of two years, eying temporary drops in brightness caused by planetary transits.

  • Publisher: Business Recorder
  • Date: 2019-04-16T00:26:45Z
  • Twitter: @brecordernews
  • Citation: Web link (Read More)

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