The Leo I Group is a nearby galaxy group in the constellation Leo, whose brightest members lie roughly 23 to 38 million light-years away, and it reaches its annual culmination at astronomical midnight and is best observed early March.
Category: Galaxy Group & Cluster
The Leo Triplet is a group of three barred spiral galaxies in the constellation Leo, spanning roughly 24 to 39 million light-years in distance, and reaches its annual culmination at astronomical midnight and is best observed early March.
The Hercules Cluster (ACO 2151) is a rich galaxy cluster in the constellation Hercules, lying about 492 million light-years away, and reaches its annual culmination at astronomical midnight and is best observed late May.
Markarian’s Chain is a graceful, curving group of galaxies in the constellation Virgo, with its member galaxies lying roughly 54.5 to 66.6 million light-years away, and it reaches its annual culmination at astronomical midnight and is best observed late March.