IC 2457

IC 2457 is a barred spiral galaxy in the constellation Cancer about 404 million ly from Earth. It spans roughly 65,000 ly, about 65% of our Milky Way's width. The light reaching us tonight left it about 404 million years ago.

Because its light is 404 million ly from home, you are seeing IC 2457 as it looked roughly 404 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). Distance computed by gravityfinder from redshift via Hubble's law (H0 = 70 km/s/Mpc).