Spiral disks are loose conglomerations of billions of stars and diffuse gas all gravitationally orbiting a galaxy center. A flat disk is thought to be created by sticky collisions of large gas clouds early in the galaxy's formation . Warped disks are not uncommon, though, and even our own Milky Way Galaxy is thought to have a small warp . The causes of spiral warps are still being investigated, but some warps are thought to result from interactions or even collisions between galaxies. ESO510-13, pictured above , is about 150 million light years away and about 100,000 light years across.
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