IC 3949

IC 3949 is a lenticular galaxy in the constellation Coma Berenices about 351 million ly from Earth. It spans roughly 100,000 ly, about the width of our Milky Way. It is receding from us at about 7,447 km/s.

Because its light is 351 million ly from home, you are seeing IC 3949 as it looked roughly 351 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).