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Chandra's elliptical orbit takes the spacecraft to an altitude of approximately 139,000 km (86,500 mi) -- more than a third of the distance to the Moon.Find out the current position of Chandra in relation to the surface of the Earth from NASA/JPL's Eyes on the Solar System applet.These bizarre objects are found across the Universe -- within double star systems and at the centers of galaxies where giant black holes grow.X-ray telescopes like Chandra can see superheated matter that is swirling toward the event horizon of a black hole.

More Dark matter is a term used to describe matter that can be inferred to exist from its gravitational effects, but does not emit or absorb detectable amounts of light. A substantial body of evidence indicates that it cannot be baryonic matter, i.e., protons and neutrons.More A new form of radiation was discovered in 1895 by Wilhelm Roentgen, a German physicist.He called it X-radiation to denote its unknown nature.Supernovas are some of the most dramatic events in the cosmos.These titanic events send shock waves rumbling through space and create giant bubbles of gas that have been superheated to millions of degrees.

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