Or in quel tempo sorgerà Michele, il gran principe, che vigila sui figli del tuo popolo. Vi sarà un tempo di angoscia, come non c'era mai stato dal sorgere delle nazioni fino a quel tempo; in quel tempo sarà salvato il tuo popolo, chiunque si troverà scritto nel libro.
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giovedì 6 aprile 2017
Cosmic Blast of X-rays Inexplicably Outshines All of a Galaxy's Stars
A mysterious, sudden, and bright flash of X-rays was caught
by the Chandra X-ray Observatory, with astronomers wondering if it
signals a completely new type of cataclysmic event.
Astronomers have detected what was likely an
extremely destructive explosive event, about 10.7 billion light years
from Earth. A mysterious, sudden, and bright flash of X-rays was
observed by the Chandra X-ray Observatory, producing a thousand times
more energy than all the stars in the galaxy where the event took place.
But then the outburst disappeared within a day.
The event, named CDF-S XT1, has properties that do not match any other
known cosmic phenomenon, such as a gamma ray burst or supernova, and
scientists are still working to understand the origin and parameters of
this puzzling explosion.
"We may have observed a completely new type of cataclysmic event," said
Kevin Schawinski of ETH Zurich in Switzerland, co-author of a new paper
that provides the known details of this enigma, in a statement. "Whatever it is, a lot more observations are needed to work out what we're seeing."
Chandra captured this bright, transient X-ray source during a 13-hour observing session on October 1, 2014.
“We had never anticipated that our observations would capture such a
rare, fast transient,” said lead author Franz Bauer of the Pontifical
Catholic University of Chile in Santiago, Chile, writing in a blog post
on the Chandra website. “After convincing ourselves that it was not
some weird instrumental effect, we reported it to the astronomy
community… to encourage follow-up observations at other wavelengths and
gain more clues as to the origin of this unique event.”