A guide to what's up in the sky for Southern Australia

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M57—The Ring Nebula in Lyra (26th Jun 2026)

The Ring Nebula, M57, is a planetary nebula in the northern constellation of Lyra

about mid-way between the prominent stars Beta and Gamma Lyrae. It has an apparent visual magnitude of 8.8, which is too faint to be visible with the naked eye, but it can be readily observed with a small telescope.

This nebula was discovered by the French astronomer Charles Messier while searching for comets in late January 1779. Fellow French astronomer Antoine Darquier de Pellepoix reported that it
was "...as large as Jupiter and resembles a planet which is fading"
(which may have contributed to the use of the persistent "planetary nebula" terminology).

A planetary nebula is formed when a star, during the last stages of its evolution before becoming a white dwarf, expels a vast luminous envelope of ionized gas into the surrounding interstellar space. The nebula is located 2,570 light-years from the Sun. After expanding for 1,610 years, the nebula currently has a diameter of 4.6 light years. That’s greater than the distance from our Sun to Alpha Centauri!