As per NASA, scientists first thought the dark spot was a Bok globule, but later found it to be an empty void in space.
NASA describes cosmic snake is actually the core of a thick, sooty cloud large enough to swallow our solar system a dozen times over.
The Black Widow Nebula was captured by Spitzer Space Telescope.
Ghost Nebula is located is about 550 light-years from Earth.
As per NASA, Skull Nebula is giant cranium is a star-forming region located 5,000 light-years away in the constellation Monoceros, the Unicorn.