Spiral Galaxy M81
M81 is a spiral galaxy about 12 million light years away that is both
relatively large in the sky and bright, making it a frequent target for both
amateur and professional astronomers.
This image is part of a "quartet
of galaxies" collaboration of professional and amateur astronomers that
combines optical data from amateur telescopes with data from the archives of
NASA missions. NASA's Marshall Space Flight Center in Huntsville, Ala., manages
the Chandra program for NASA's Science Mission Directorate in Washington. The
Smithsonian Astrophysical Observatory in Cambridge, Mass., controls Chandra's
science and flight operations.
Image credit: X-ray: NASA/CXC/SAO; Optical: Detlef Hartmann; Infrared:
NASA/JPL-Caltech
Guillermo Gonzalo Sánchez Achutegui
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