The M51 Group Reference Libraries
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The M51 Group, located in Canes Venatici, is named after the brightest galaxy in the group, the Whirlpool Galaxy (M51A). The few other notable members include the companion galaxy to the Whirlpool Galaxy (M51B) and the Sunflower Galaxy (M63).
Word of the Day
The word 'deuteragonist' comes from a Greek word meaning 'an actor of second-class parts'.