X-ray Images of Sagittarius A*
Researchers have found evidence that the normally dim region very close to
the supermassive black hole at the center of the Milky Way galaxy flared up with
at least two bright outbursts in the past few hundred years. These images are
from a study of Chandra observations taken over twelve years that show rapid
variations in the X-ray emission from gas clouds surrounding the supermassive
black hole. The phenomenon, known as a "light echo," provides astronomers an
opportunity to piece together what objects like Sgr A* were doing long before
there were X-ray telescopes to observe them.
Credit: X-ray: NASA/CXC/APC/Universite de Paris Diderot/M.Clavel et al.
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NASA
Guillermo Gonzalo Sánchez Achutegui
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