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- IC_2497 abstract "IC 2497 is a spiral galaxy close to the intergalactic cloud Hanny's Voorwerp.IC 2497 is a former quasar, whose light lit up Hanny's Voorwerp, which is now a light echo of that extinct quasar. It is about 45,000–70,000 light-years (14,000–21,000 pc) away from Hanny's Voorwerp. The quasar shut down sometime in the last 70,000 years. This revises current theories of quasar operation, as the quasar is quiescient, shutting down much faster than was thought possible, and is much cooler than predicted. The galaxy is currently 100 to 10,000 times dimmer than it was when its quasar burned into Hanny's Voorwerp. It is currently the nearest known quasar, being 730 million light years away, and the one with the best view of its host galaxy. The nearest active quasar is 3C 273, 1.7 billion light years further away.".
- IC_2497 wikiPageID "29560833".
- IC_2497 wikiPageRevisionID "540498411".
- IC_2497 appdimV "0.39".
- IC_2497 constell "Leo Minor".
- IC_2497 epoch Epoch_(astronomy).
- IC_2497 hasPhotoCollection IC_2497.
- IC_2497 subject Category:IC_objects.
- IC_2497 subject Category:LEDA_objects.
- IC_2497 subject Category:Leo_Minor.
- IC_2497 subject Category:Spiral_galaxies.
- IC_2497 comment "IC 2497 is a spiral galaxy close to the intergalactic cloud Hanny's Voorwerp.IC 2497 is a former quasar, whose light lit up Hanny's Voorwerp, which is now a light echo of that extinct quasar. It is about 45,000–70,000 light-years (14,000–21,000 pc) away from Hanny's Voorwerp. The quasar shut down sometime in the last 70,000 years.".
- IC_2497 label "IC 2497".
- IC_2497 label "IC 2497".
- IC_2497 label "IC 2497".
- IC_2497 sameAs IC_2497.
- IC_2497 sameAs IC_2497.
- IC_2497 sameAs IC_2497.
- IC_2497 sameAs m.0ds5km8.
- IC_2497 sameAs Q1341148.
- IC_2497 sameAs Q1341148.
- IC_2497 wasDerivedFrom IC_2497?oldid=540498411.
- IC_2497 isPrimaryTopicOf IC_2497.