One of the largest diffuse nebulae in our sky – The Great Carina Nebula!
This picture presents a wide view of the central region of Carina Nebula by assembling 48 frames clicked by Hubble Space Telescope. This immense nebula contains a few brilliant massive stars, areas where extreme star formation is happening, and places where some massive stars have already self-destructed themselves. Though it is mostly made from hydrogen (like the other star-forming regions), but there are also hints of other elements like oxygen and sulphur (implying that it must have, at least party, been formed from the remnants of earlier generation of stars, only then can these higher elements be formed). In the picture, red region is the sulfur and blue shows the oxygen emission.
For a detailed journey through this nebulae, go through this amazing video embedded below –