11. The resolving power of the Herschel telescopes revealed that the nebulae in the Messier catalogue were clusters of stars . 12. An open cluster of stars nearly 130 light-years away, the Hyades are an impressive sight in binoculars. 13. He divided the nebulae into eight classes, with classes VI through VIII being used to classify clusters of stars . 14. Consequently, changes in trading patterns can be seen in the planetarium as explosions of life surrounding specific clusters of stars . 15. This was also the form of the diagram using apparent magnitudes of a cluster of stars all at the same distance. 16. With a larger instrument, British astronomer John Herschel called it a bright " cluster of stars of a round figure ". 17. Over on the tail side of Serpens is M16, an open cluster of stars about 8, 500 light-years away. 18. The Praesepe, also known as the Beehive Cluster, is an open cluster of stars smack dab in the middle of Cancer. 19. About 4 degrees to the jobvheast ( upper left ) of Shaula is the large, open cluster of stars known as M7. 20. M34 is a cluster of stars , just barely visible to the naked eye, about five degrees west-northwest of Algol.
