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Jun 8, 2017 - Space - In biology, 'symbiosis' refers to two organisms that live close to and interact with one another. Astronomers have long studied a class of stars ? called symbiotic stars ? that co-exist in a similar way. Using data from NASA's Chandra X-ray Observatory and other telescopes, astronomers are gaining a better understanding of how volatile this close stellar relationship can be. R Aquarii (R Aqr, for short) is one of the best known of the symbiotic stars. Located at a distance of about 710 light years from Earth, its changes in brightness were first noticed with the naked eye almost a thousand years ago. Since then, astronomers have studied this object and determined that R Aqr is not one star, but two: a small, dense white dwarf and a cool red, giant star. (Credit Image: ? NASA via ZUMA Wire/ZUMAPRESS.com)

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20170608_sha_z03_456.jpg
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? 2017 by via ZUMA Wire RealTime Images
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Daily Round Up 10 June 2017
Jun 8, 2017 - Space - In biology, 'symbiosis' refers to two organisms that live close to and interact with one another. Astronomers have long studied a class of stars ? called symbiotic stars ? that co-exist in a similar way. Using data from NASA's Chandra X-ray Observatory and other telescopes, astronomers are gaining a better understanding of how volatile this close stellar relationship can be. R Aquarii (R Aqr, for short) is one of the best known of the symbiotic stars. Located at a distance of about 710 light years from Earth, its changes in brightness were first noticed with the naked eye almost a thousand years ago. Since then, astronomers have studied this object and determined that R Aqr is not one star, but two: a small, dense white dwarf and a cool red, giant star. (Credit Image: ? NASA via ZUMA Wire/ZUMAPRESS.com)