Spectral Readings Bring Alien Planet Into Sharper Focus

April 23, 2015 12:08 AM

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Astronomers have detected an exoplanet's visible-light spectrum directly for the first time ever, a milestone that could help bring many other alien worlds into clearer focus down the road.

The scientists used the HARPS instrument on the European Southern Observatory's 3.6-meter telescope at the La Silla Observatory in Chile to study the spectrum of visible light reflected off the exoplanet 51 Pegasi b, which lies about 50 light-years from Earth in the constellation Pegasus.

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