NGC 21

NGC 21 is a barred spiral galaxy in the constellation Andromeda about 221 million ly from Earth. It spans roughly 89,000 ly, about the width of our Milky Way. It is receding from us at about 4,859 km/s.

Because its light is 221 million ly from home, you are seeing NGC 21 as it looked roughly 221 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).