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Home Science

Our closest exoplanet, Proxima b, could have a vast and cold neighbor

by Ingrid Hudson
April 15, 2019
in Science
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Our closest exoplanet, Proxima b, could have a vast and cold neighbor
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Our closest exoplanet found so far is Proxima b, which orbits the star Proxima Centauri found 4.2 light-years from Earth. Orbiting a red dwarf, Proxima b sits in the tenable zone, which means it could host liquid water on its surface, and is roughly a similar size as Earth, making it a fascinating focus for dreams of planetary colonization. It was previously trusted that Proxima b was the main world facilitated by Proxima Centauri.

However at this point new proof proposes that Proxima b may have a neighbor, Proxima c. Declared at the Breakthrough Initiatives conference this week, a group of researchers driven by Mario Damasso from the University of Turin, Italy, and Fabio Del Sordo from the University of Crete, Greece, watched Proxima Centauri utilizing the High Accuracy Radial velocity Planet Searcher (HARPS) instrument. HARPS is situated in the La Silla Observatory in Chile and was utilized to explore the gravitational impacts of orbiting planets.

The researchers watched a “wobble” of Proxima Centauri which recommends there could be a second planet in orbit around it. This wobble had been previously watched yet was just of borderline significance, yet in the last few years a bigger dataset has been gathered. Breaking down this bigger dataset pushed the discoveries into the territory of significance.

In any case, Damasso and Sordo were quick to stress this is just a fundamental finding. “It is only a candidate,” Damasso said amid the presentation, as indicated by Scientific American. “This is very important to underline.”

Proxima c, in the event that it exists, is evaluated to be a super-Earth with a mass around six times that of our planet. It would orbit its star each 1900 days at 1.5 times the separation between the Earth and the Sun, which means it is a cold and ungracious spot. This is on the grounds that, as a red dwarf, Proxima Centauri is littler and dimmer than our Sun. So its rays would scarcely achieve Proxima c enough to warm it, making the surface temperature low.

Tags: exoplanetFabio Del SordoMario DamassoProxima bProxima cProxima Centauri
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