A supernova in a galaxy NGC 6946 is changing its color from bluish to yellowish due to cooling of an expanding gaseous shell. The color change was already noticeably at the end of Jun.
SkyWatcher 150/750 + Canon EOS 600D ISO 1600. 186x30s (1st image; two sessions: May 20 and 27), 101x30s (2nd image, Jul 22)
Kyiv
SkyWatcher 150/750 + Canon EOS 600D ISO 1600. 186x30s (1st image; two sessions: May 20 and 27), 101x30s (2nd image, Jul 22)
Kyiv
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