The Tornado is an unusual radio source near the center of the Milky Way Galaxy showing a number of remarkable filamentary structures influenced by the magnetic field. It is thought to be a supernova remnant, although the evidence is still inconclusive. Another unusual source is a cluster of bright, compact nebulae located in the lower right edge of the Tornado Nebula. Astronomers debate the nature of the relationship between the larger Tornado Nebula and the cluster of compact nebulae. (Courtesy of National Radio Astronomy Observatory's Very Large Array of radio telescopes.)