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The second-coldest imaged exoplanet found to date

Dragon
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Post by Dragon Fri Aug 06, 2021 3:55 am

Astronomers have discovered thousands of exoplanets—planets beyond our solar system—but few have been directly imaged, because they are extremely difficult to see with existing telescopes.

A University of Hawaiʻi Institute for Astronomy (IfA) graduate student has beaten the odds and discovered a directly imaged exoplanet, and it's the closest one to Earth ever found, at a distance of only 35 light years.

The team's research, published in The Astrophysical Journal Letters, led to the discovery of the low-temperature gas-giant planet orbiting a low-mass red dwarf star, about 6,000 times farther than the Earth orbits the sun.

They dubbed the new planetary system COCONUTS-2, and the new planet COCONUTS-2b.

COCONUTS-2b is the second-coldest imaged exoplanet found to date, with a temperature of just 320 degrees Fahrenheit, which is slightly cooler than most ovens use to bake cookies.


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The second-coldest imaged exoplanet found to date 334pu7m
Dragon
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Post by Dragon Fri Aug 06, 2021 3:58 am

The second-coldest imaged exoplanet found to date The-second-coldest-ima
Credit: B. Bays (SOEST/UH)

Illustration of gas-giant planet COCONUTS-2b.

The planet can be directly imaged thanks to emitted light produced by residual heat trapped since the planet's formation.

Still, the energy output of the planet is more than a million times weaker than the sun's, so the planet can only be detected using lower-energy infrared light.


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The second-coldest imaged exoplanet found to date 334pu7m
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Post by Dragon Fri Aug 06, 2021 3:59 am



Astronomers Capture Closet Ever Image of Nearby Exoplanet

COCONUTS-2b is only 35 light years away, but its solar system is much different than our own.


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