Globular cluster M15 hides within it a planetary nebula, Pease 1. Observers with large scopes and steady skies can find it.

Using a new imaging technique, the researchers successfully captured more than one thousand colors that identified specific celestial objects like 500 planetary nebulae, which are responsible for the ...

A colossal cluster of galaxies is bending the very fabric of space—and it’s the focus of this week’s breathtaking image from ...

But there's more: M15 was the first globular cluster in which astronomers found a planetary nebula, the illuminated bubble of gas and dust blown off by a dying Sun-like star.