Resembling a giant eye looking across 700 light years of space, the Helix Nebula ia one of the closest planetarty nebula to Earth. The image reveales intricate details in the glowing gas that compirses the nebula including the tadpole-like ‘cometary knots’ that appear to stream from the inner edge of the gaseous ring.these are actually clumps of gas being bombarded by sever radiation from the dying star at the center of the nebula, and the ‘head’ of each one is approximately the size of our solar system.