The Whirlpool Galaxy (M51A or NGC 5194) and (M51B or NGC 5195, left). The Whirlpool Galaxy is a grand-design spiral galaxy, interacting with NGC 5195, a dwarg galxy. Both galaxies are located 23 ± 4 million light-years away in Canes Venatici.
This image by NASA's Hubble Space Telescope shows a face-on view of the Whirlpool Galaxy (M51). Taken in visible light, it highlights the attributes of a typical spiral galaxy, including graceful, curving arms, pink star-forming regions, and brilliant blue strands of star clusters.
"The Whirlpool Galaxy is a classic spiral galaxy. At only 30 million light years distant and fully 60 thousand light years across, M51, also known as NGC 5194, is one of the brightest and most picturesque galaxies on the sky. This image is a digital combination of a ground-based image from the 0.9-meter telescope at Kitt Peak National Observatory and a space-based image from the Hubble Space Telescope highlighting sharp features normally too red to be seen." Image Credit: NASA/Hubble