IC 3958

IC 3958 is an elliptical galaxy in the constellation Coma Berenices about 1.0 billion ly from Earth. It spans roughly 160,000 ly, about 1.6 times the width of our Milky Way. The light reaching us tonight left it about 1.0 billion years ago.

Because its light is 1.0 billion ly from home, you are seeing IC 3958 as it looked roughly 1.0 billion 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). Distance computed by gravityfinder from redshift via Hubble's law (H0 = 70 km/s/Mpc).