
Planetary Nebula Mz3: The Ant Nebula
Credit: R. Sahai (JPL) et al., Hubble Heritage Team, ESA, NASA Explanation: Why isn't this ant a big sphere?
Planetary nebula Mz3 is being cast off by a star similar to our
Sun that is, surely, round. Why then would the gas that is
streaming away create an
ant-shaped nebula that is distinctly not round?
Clues might include the high 1000-kilometer per second speed of the expelled gas, the
light-year long length of the structure, and the
magnetism of the star
visible above at the nebula's center. One possible answer is that
Mz3 is hiding a second, dimmer star that
orbits close in to the bright star.
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