Eta Carinae Nebula (NGC 3372) The Eta Carinae Nebula (NGC 3372) is a massive, highly luminous, and active star-forming region located approximately 7,500 to 8,500 light-years away in the southern constellation Carina. It is one of the largest diffuse nebulae in the sky, spanning over 260 light-years—several times larger than the Orion Nebula—and contains the famous, unstable binary star system Eta Carinae Image data: Telescope: Askar SQA55 Camera: SVBony SV605CC Filter: SV220 7nm 30 frames of 300 seconds.