And, another of the Crab nebula pulsar. Composite of X-ray (Chandra) in blue, and optical (HST) in red. The size of the X-ray image is smaller because the higher energy X-ray emitting electrons radiate away their energy more quickly than the lower energy optically emitting electrons as they move. The inner ring is about one light year across.
NASA just released this pic from the hubble telescope - revealing the true shape of the Ring Nebula. - has the best funny pics, gifs, videos, gaming, anime, manga, movie, tv, cosplay, sport, food, memes, cute, fail, wtf photos on the internet!