NGC 3994

NGC 3994 is a spiral galaxy in the constellation Ursa Major about 144 million ly from Earth. It spans roughly 36,000 ly, about 36% of our Milky Way's width. It is receding from us at about 3,096 km/s.

Because its light is 144 million ly from home, you are seeing NGC 3994 as it looked roughly 144 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).