Lower's nebula (also known as Sharpless2-261) is named after Harold Lower,
an amateur astronomer in the U.S. who discovered and photographed this object in 1939.
This nebula is dominated by ionized hydrogen glowing under the fierce radiation from massive,
bright stars. The central region also shows ionized oxygen, glowing blue in this image
(to me it looks like a rubber duckie floating on top of a soap bubble; look at the "original" size and maybe you'll see it that way too).
Lower's Nebula is located in the constellation Orion and is about 3200 light years from earth.

Image data:
Telescope: Takahashi 106
Camera: ZWO ADI6200MM
Exposure: Red, Green, and Blue: 30 minutes each
Hydrogen-alpha: 270 minutes
Oxygen III: 100 minutes
(total = 7 hours 40 minutes)