Triple star system involving a pulsar suggests Einstein was right. Kevin Gill/Flickr, CC BY-ND

Free-falling dead stars show that a cornerstone of physics holds up

Free-falling dead stars show that a cornerstone of physics holds up Triple star system involving a pulsar suggests Einstein was right. Kevin Gill/Flickr, CC BY-ND…

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Looks can be deceiving. In this Hubble Space Telescope image, the white dwarf star Stein 2051B and the smaller star below it appear to be close neighbors. The stars, however, reside far away from each other. Stein 2051B is 17 light-years from Earth; the other star is about 5,000 light-years away. Stein 2051B is named for its discoverer, Dutch Roman Catholic priest and astronomer Johan Stein. Credits: NASA, ESA, and K. Sahu (STScI)

Hubble Astronomers Develop a New Use for a Century-Old Relativity Experiment to Measure a White Dwarf’s Mass

Hubble Astronomers Develop a New Use for a Century-Old Relativity Experiment to Measure a White Dwarf’s Mass Astronomers have used the sharp vision of NASA’s…

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Artist's illustration of a star found in the closest orbit known around a black hole in the globular cluster named 47 Tucanae. Credits: X-ray: NASA/CXC/University of Alberta/A.Bahramian et al.; Illustration: NASA/CXC/M.Weiss

Star Discovered in Closest Known Orbit Around Likely Black Hole

Star Discovered in Closest Known Orbit Around Likely Black Hole Astronomers have found evidence for a star that whips around a black hole about twice…

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