Assertion: nebula's star | /r/HasProperty | globular clusters
Facets:
Source sentences:
text: Aquarius contains the famous supergiant star Sadalsuud (Beta Aquarii) and a number of notable deep sky objects: the globular clusters Messier 2 and Messier 72, the asterism Messier 73, the Aquarius Dwarf Galaxy, Atoms for Peace Galaxy (NGC 7252) and two well-known nebulae: the Saturn Nebula and the Helix Nebula.
text: Some astronomers believe that galaxies usually form from smaller clusters of about one million stars, known as globular clusters.