Édouard Stephan
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Édouard Jean-Marie Stephan was a French astronomer. His surname is sometimes spelled Stéphan in some literature, but this is apparently erroneous.
Édouard Jean Marie Stephan
Stephan's Quintet
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Stephan's Quintet is a visual grouping of five galaxies of which four form the first compact galaxy group ever discovered. The group, visible in the constellation Pegasus, was discovered by Édouard St
Édouard Stephan
…In 1881 he discovered NGC 5, and he discovered the galaxy NGC 6027 the following year using the 80 cm reflector. Among others, he discovered Stephan's Quintet, also known as "Arp 319", a group of five galaxies. Stephan made this discovery with the first telescope equipped with a reflection coated mirror. In…
Clockwise from upper left: NGC 7320, NGC 7319, NGC 7318 (a and b), NGC 7317
Stephan's Quintet. The blue arc across the top center is a shock caused by colliding intergalactic gas. Image Credits: X-ray (blue): NASA/CXC/CfA/E. O'Sullivan Optical (brown): Canada-France-Hawaii-Telescope/Coelum
Earthbound monochrome (sdss-g filtered) image of Stephan's Quintet from the Liverpool Telescope
Detail of the quintet in a photo by Hubble Space Telescope, 1998–99. Credits: NASA/ESA