NGC 5723

NGC 5723 is an elliptical galaxy in the constellation Boötes about 508 million ly from Earth. It spans roughly 95,000 ly, about the width of our Milky Way. The light reaching us tonight left it about 508 million years ago.

Because its light is 508 million ly from home, you are seeing NGC 5723 as it looked roughly 508 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).