IC 4417

IC 4417 is an elliptical galaxy in the constellation Boötes about 747 million ly from Earth. It spans roughly 240,000 ly, about 2.4 times the width of our Milky Way. The light reaching us tonight left it about 747 million years ago.

Because its light is 747 million ly from home, you are seeing IC 4417 as it looked roughly 747 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).