Si ascolta l’eco di quasar morte.

Un benvenuto a chi ci capita per la prima volta. Un bentrovato invece a chi c’era già dall’altra parte e attendeva solo la riapertura della soglia.

English: The X-ray image of the quasar PKS 112...

English: The X-ray image of the quasar PKS 1127-145, a highly luminous source of X-rays and visible light about 10 billion light years from Earth, shows an enormous X-ray jet that extends at least a million light years from the quasar. (Photo credit: Wikipedia)

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