Amazing Sky by Alan Dyer

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NGC 2392, Clown-Face Nebula (Eyepiece View).jpg

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This is the small planetary nebula NGC 2392, aka the Clown Face Nebula, in Gemini., processed to simulate the view through a low-power telescope eyepiece.

Even shooting with a focal length of 900mm the nebula appears just as a green spot, reminiscent of the appearance of Uranus, thus the name “planetary nebula” given to this class of objects by the discoverer of Uranus, William Herschel.

This is a stack of just 5 x 8-minute exposures with the Canon EOS Ra at ISO 800 through the SharpStar 140mm refractor at f/6.5 with no field flattener. Taken from home March 27, 2020.
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© 2020 Alan Dyer
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Simulated Naked-Eye and Eyepiece Views
This is the small planetary nebula NGC 2392, aka the Clown Face Nebula, in Gemini., processed to simulate the view through a low-power telescope eyepiece. <br /> <br /> Even shooting with a focal length of 900mm the nebula appears just as a green spot, reminiscent of the appearance of Uranus, thus the name “planetary nebula” given to this class of objects by the discoverer of Uranus, William Herschel.<br /> <br /> This is a stack of just 5 x 8-minute exposures with the Canon EOS Ra at ISO 800 through the SharpStar 140mm refractor at f/6.5 with no field flattener. Taken from home March 27, 2020.