Binary Black Hole System
The x-ray source at the core of NGC 300 is designated NGC 300 X-1. Astronomers speculate that NGC 300 X-1 is a new kind of Wolf-Rayet black hole binary system similar to the confirmed such system IC 10 X-1. Their shared properties include an orbital period of ~30 hours and x-ray brightness of ~1×1038 ergs.
Read more about this topic: NGC 300
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