M 15 and Pease 1

M 15 is the highlight in globular clusters in the autumn skies. Its age is believed to be about 13 billion years, hence its stars being almost as old as the universe itself! Located to the west of Pegasus it can easily be seen in the smallest telescopes. However, it requires large optics to resolve the core of this magnificent cluster.

In very steady skies, M 15 reveals a curiosity: The tiny Planetary Pease 1 located right within the cluster. Its visual size is only 3 arcsecs, therefore it must be about 0,98 lightyears in diameter.