Proxima b 

#GS3 #Science &Technology 

An international team of researchers has confirmed the existence of Proxima b, an Earth-like planet that's orbiting the closest star to our Solar System, Proxima Centauri which is only 4.2 light-years from the Sun. 


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  • They found that Proxima b is 1.17 times the mass of Earth, smaller than the older estimate of 1.3 times. It orbits its star in just 11.2 days. 
  • Proxima b was first discovered in 2016 using HARPS (High Accuracy Radial Velocity Planet Searcher), a planet-hunting spectrograph mounted to one of the telescopes at the European Southern Observatory at the La Silla Observatory in Chile. 
  • In the recent research, the scientists were able to hone in on the planet with ESPRESSO, a new generation spectrograph also at the observatory in Chile, which boasts three times the precision as HARPS. 
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