Gravitational astronomy proves its maturity

Gravitational astronomy proves its maturity

With the sighting of a merger between a black hole and a neutron star

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Our Favorite Images From Chandra X-Ray Telescope’s 20 Years in Space

If the Hubble Space Telescope set the standard for what a jaw-dropping space picture should look like, then the Chandra X-Ray Observatory, launched 20 years ago this week, perfected it. Read more…

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