The M13 and Hercules constellations can be viewed the best in the summertime, in the June night sky. Other clusters of interesting sights can also be seen. The Hercules, globular cluster along with Scorpius is a must see during the month. The M6 and M7 star clusters also reside closely. The M7 is the most dominant star cluster in the sky and is an astounding 200 million years old. The Antares star, the largest in the solar system can also be seen during this time. Learn about all of these amazing star clusters and more at History.com.