NGC 5378

NGC 5378 is a spiral galaxy in the constellation Canes Venatici about 139 million ly from Earth. It spans roughly 82,000 ly, about 82% of our Milky Way's width. It is receding from us at about 3,017 km/s.

Because its light is 139 million ly from home, you are seeing NGC 5378 as it looked roughly 139 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).