NGC 243

NGC 243 is a lenticular galaxy in the constellation Andromeda about 225 million ly from Earth. It spans roughly 60,000 ly, about 60% of our Milky Way's width. The light reaching us tonight left it about 225 million years ago.

Because its light is 225 million ly from home, you are seeing NGC 243 as it looked roughly 225 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).