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Year-ender: Historical human breakthroughs in 2019

chinadaily.com.cn | Updated: 2019-12-21 06:40
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Humanity's first nearby super-Earth discovered

This diagram shows the layout of the GJ 357 system. Planet d orbits within the star’s so-called habitable zone, the orbital region where liquid water can exist on a rocky planet’s surface. If it has a dense atmosphere, which will take future studies to determine, GJ357d could be warm enough to permit the presence of liquid water. [Photo/NASA's Goddard Space Flight Center]

NASA's Transiting Exoplanet Survey Satellite (TESS), a mission designed to comb the heavens for exoplanets, has discovered its first potentially habitable world outside the solar system.

In a new paper in The Astrophysical Journal Letters, a team led by Lisa Kaltenegger, associate professor of astronomy and director of Cornell's Carl Sagan Institute, models the conditions under which the planet -- discovered in early 2019 -- could sustain life.

"This is exciting, as this is humanity's first nearby super-Earth that could harbor life -- uncovered with help from TESS, our small, mighty mission with a huge reach," said Kaltenegger.

As this super-Earth exoplanet is more massive than earth, Kaltenegger said this discovery will provide insight into Earth's heavyweight planetary cousins.

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