M57

M57 or M-57 may be:

M57 motorway, in England
Planetary Nebula M57, (also known as Messier Object 57 or the Ring Nebula) a planetary nebula in the Lyra constellation.
M57 (rocket launcher)

From Wikipedia, the Free Encyclopedia. Original article here. Support Wikipedia by contributing or donating.
All text is available under the terms of the GNU Free Documentation License See Wikipedia Copyrights for details.