Mystery objects stump astronomers
The two bizarre objects in our galaxy - which appear to be light-years wide, spew powerful radiation, yet appear pitch black - were detected in a survey of sources within our galaxy of very high-energy gamma rays.
The newfound objects are distinct from another, well known type of gamma-ray source called gamma-ray bursts—momentary flashes of gamma rays, detected about once a day, which astronomers think may signal the birth of black holes as dead stars abruptly shrink out of existence.
[The objects are not black holes, which generally are smaller and which, despite their name, do seem to emit visible light, though that light actually comes from around them and not inside them. Astronomers have dubbed the mystery objects dark accelerators.]
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