NGC 7397

NGC 7397 is a lenticular galaxy in the constellation Pisces about 220 million ly from Earth. It spans roughly 45,000 ly, about 45% of our Milky Way's width. The light reaching us tonight left it about 220 million years ago.

Because its light is 220 million ly from home, you are seeing NGC 7397 as it looked roughly 220 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).