This is the galaxy Messier 66 as observed in infrared light by the Spitzer Space Telescope. The image is a four-channel false-color composite—blue indicates emission at 3.6 µm, green 4.5 µm, and red 5.8 and 8.0 µm. Messier 66 (also known as NGC 3627) is an intermediate spiral galaxy about 36 million light-years away. It’s about 95 thousand light-years across.
Image Credit: NASA