... Corona . Coronal Hole . Coronal mass ejection . Crabnebula . Crater (impact) . Cross staff . Date Line . ... Crabnebula --a cloud-like nebula observed in the Crab constellation, the remnant of a supernova explosion observed in China in ...
... The array could select signals from a narrow range of directions, and Ken Franklin and Bernie Burke calibrated it using a known source, the CrabNebula, then began surveying the surrounding sky. ...
... The collapsed core of the CrabNebula apparently rotates 30 times a second, because that is the frequency at which it blinks in x-rays and radio (and I believe in its light, too). ...
... The collapsed core of the CrabNebula apparently rotates 30 times a second, because that is the frequency at which it blinks in x-rays and radio (and I believe in its light, too). ...