RUSSELL KIGHTLEY / SCIENCE PHOTO LIBRARY RUSSELL KIGHTLEY / SCIENCE PHOTO LIBRARY
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Black hole. Artwork of a binary system containing a normal star (left) and a black hole. Gas from the star spirals into the black hole, forming an orbiting disc (accretion disc, red). Gas in the inner disc (blue/white) reaches temperatures of millions of Kelvin, causing it to emit X-rays. The extreme gravitational conditions near the black hole accelerate jets of material (pale blue) to extremely high speeds.
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