IC 3721

IC 3721 is a spiral galaxy in the constellation Coma Berenices about 307 million ly from Earth. It spans roughly 86,000 ly, about the width of our Milky Way. It is receding from us at about 6,598 km/s.

Because its light is 307 million ly from home, you are seeing IC 3721 as it looked roughly 307 million years ago. The photons left before that much of history had passed, and are only now reaching us. This distance is estimated from the galaxy's redshift, so the lookback time is approximate.

Source: structural data (position, morphology, brightness, redshift) from OpenNGC (CC BY-SA). Recession velocity from RC3 (de Vaucouleurs et al. 1991, via NASA/HEASARC, public domain). Distance computed by gravityfinder from redshift via Hubble's law (H0 = 70 km/s/Mpc).