The Hour Glass Nebula

Image was took from the Hubble Space Telescope.

The Hour Glass Nebula is a planetary nebula, located 8,000 light years away from Earth, in a small constellation named Musca. A planetary nebula is a giant cloud of gas formed from a Sun-like star undergoing the last stages of its life. 

Near A Star's death, it blasts away its outer layers, leaving the stars dense core behind emitting ultra violet light, which ionises the gases around the star, causing the gases to glow. Different colours within the photo tells us about certain elements that are present. The red colours tells us that Nitrogen is present, the green colour tells us that Hydrogen is present and the blue colour tells us that Oxygen is present. The star's dense core will eventually cool down to the point where the forces of gravity will push it together to create a White Dwarf.