Little Dumbbell Nebula (M76, NGC 650 and 651)
The bright bar-shaped main body (measuring 42" × 87"), is probably a slightly elliptical ring seen edge-on from only a few degrees off its equatorial plane. This ring seems to be expanding at about 42 km/s. Along the axis perpendicular to the ring plane, the gas is moving out more rapidly to form lower surface-brightness wings (157" × 87"). Finally, there is a faint halo covering a region about 290" in diameter, consisting of material that was probably ejected in the form of stellar winds from the central star when it was still in its red giant phase.
Related categories• NEBULAE AND STAR CLUSTERS
• MESSIER CATALOGUE
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