New Clue in the Mystery of the Green Blob and the Disappearing Quasar

Galaxy IC 2497 above Hanny's Voorwerp.  Image credit and copyright- X-ray: NASA/CXC/ETH Zurich/L.Sartori et al, Optical: NASA/STScI

Hanny’s Voorwerp- Dutch for “Hanny’s Object” and more casually known as the “Green Blob”- is an intergalactic gas cloud located approximately 680 million light-years from Earth. Adjacent to Hanny’s Voorwerp is IC 2497, a galaxy approximately 200,000 light-years from Earth and similar in size to our own galaxy, the Milky …

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