Description:
Messier 51, also known as the Whirlpool Galaxy, is a striking spiral galaxy located about 27 million light-years away in the constellation Canes Venatici. It’s one of the most iconic galaxies in the sky, easily recognized for its face-on spiral structure and interaction with a smaller companion galaxy, NGC 5195.
This interaction is what makes M51 so unique—NGC 5195 is tugging on M51’s arms, triggering waves of star formation and giving the galaxy its dramatic appearance. M51 spans about 76,000 light-years and glows brightly with newborn stars and dense dust lanes.
It was the first galaxy where spiral structure was identified (by Lord Rosse in 1845), making it historically important.