| http://www.w3.org/ns/prov#value | - RELATED TOPICS: EXOPLANETS | CHANDRAThis graphic depicts HD 189733b, the first exoplanet caught passing in front of its parent star in X-rays. // X-ray: NASA/CXC/SAO/K.Poppenhaeger et al; Illustration: NASAFor the first time since exoplanets, or planets around stars other than the Sun, were discovered almost 20 years ago, X-ray observations have detected an exoplanet passing in front of its parent
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