This illustration shows a star surrounded by a protoplanetary disk. A new study uses data from NASA's Spitzer Space Telescope and four ground-based telescopes to determine the distance from a star to the inner rim of its surrounding protoplanetary disk. Researchers used a method called "photo-reverberation," also known as "light echoes. via NASA ift.tt/26rHbbb
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Light Echoes Used to Study Protoplanetary Disks was taken on April 25, 2016 at 07:36AM
embiggen by clicking http://flic.kr/p/GzzYAN
Light Echoes Used to Study Protoplanetary Disks was taken on April 25, 2016 at 07:36AM
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