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IMAGEN ASTRONÓMICA DEL DÍA


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December the 1st : witnessing an outstanding event in the remote Universe...

Quasars use to be out of reach of amateur telescopes, however in the last days something exceptional happened in the constellation of Pegasus.

Quasars are bright active galactic nuclei found in the youth of the Universe only, some kind of early stage in the life of galaxies, hence they are observable today as extremely remote objects. One of them, 4C 11.69 (also known as CTA 102), stands at some 8 billion light-years away (yes, 8,000 millions), being normally invisible except for the largest telescopes in the world. However, some days ago, it suddenly began to brighten until that night of December 1st, when it comes bright enough to be visible in medium size telescopes, or even in large binoculars ! Indeed, this is quite a special moment in the life of any astronomer, since CTA 102 became the brightest quasar ever recorded in history...

Of course at Pangue we didn't miss the opportunity to watch such a remote celestial object, whose light is coming from times well before the birth of the Solar System... And of course we even succeeded to capture the phenomenon...

The image below shows well what's happening. The quasar, located near the center of the field, is absolutely not a spectacular viewing: whithout the correct information you could easily miss it for a normal, anonymous faint star.
Still, this is the fascination: a quasar appearing just as a normal faint star !
The next image shows CTA 102, marked by the two white lines. Incidentally, note also the faint galaxy NGC7305, a small round smudge to its lower left.

Photo: Cristian Valenzuela/Observatorio del Pangue - December 1st, 2016.
Camera: Canon EOS 60D at prime focus of Meade LX200 16" f/6.3 ; Total exposure : 25 sec.