Release No.: 03-07: Molecular Cloud Has a Heartbeat For Immediate Release: February 28, 2003
Caption: Although shaped like a kidney, the dark molecular cloud known as Barnard 68 appears to beat like a heart, pulsing once every 250,000 years. A supernova shockwave may have smacked into Barnard 68, causing it to ring like a bell. Credit: European Southern Observatory
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