NGC 3802

NGC 3802 is a barred spiral galaxy in the constellation Leo about 153 million ly from Earth. It spans roughly 46,000 ly, about 46% of our Milky Way's width. The light reaching us tonight left it about 153 million years ago.

Because its light is 153 million ly from home, you are seeing NGC 3802 as it looked roughly 153 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).