Messier 76 — Planetary Nebula in Perseus

M76, the Little Dumbbell Nebula (also known as the Cork Nebula or Barbell Nebula), is a planetary nebula in the constellation Perseus, located about 2,500 light-years from Earth. At magnitude 10.1, it is one of the faintest objects in the Messier catalog. The nebula has a distinctive bipolar structure consisting of a bright central bar (the ring seen edge-on) flanked by two fainter lobes of expanding gas. It spans about 2.7 by 1.8 arcminutes, corresponding to a physical size of roughly 1.2 light-years. The central star is a hot white dwarf with a surface temperature of about 60,000 K. M76 is sometimes considered a miniature version of M27, the Dumbbell Nebula, which is how it earned its 'Little Dumbbell' nickname.

Located about 1 degree north-northwest of the star Phi Persei, between Perseus and Andromeda. M76 is a challenging object for small telescopes due to its faintness. A 4-inch telescope at 100x shows a small, slightly elongated fuzzy patch. In an 8-inch telescope, the bipolar structure becomes apparent — look for the brighter central bar and the fainter lobes on either side. An OIII filter significantly improves contrast and helps reveal the nebula's structure. Higher magnification (150-200x) works well once you have found it. Best observed from September through February when Perseus is high.

Discovered by Pierre Mechain on September 5, 1780, and cataloged by Messier on October 21, 1780. Messier described it as 'a nebula without a star.' Due to its two-lobed appearance, M76 was initially given two NGC numbers: NGC 650 for the brighter northeastern lobe and NGC 651 for the southwestern lobe, before it was recognized as a single object. It was one of the first planetary nebulae to be studied spectroscopically by William Huggins in 1866, confirming its gaseous nature.