M20 : The Trifid Nebula

The Trifid Nebula is famous for its three-lobed appearance. The red emission nebula has a young star cluster near its centre. 

The distance to this nebula is fairly uncertain, with values between 2200 and 7600 light years. 

This image was taken in red, green, blue and hydrogen-alpha.

M20 : The Trifid Nebula