NGC 640

NGC 640 is a barred spiral galaxy in the constellation Cetus about 349 million ly from Earth. It spans roughly 77,000 ly, about 77% of our Milky Way's width. The light reaching us tonight left it about 349 million years ago.

Because its light is 349 million ly from home, you are seeing NGC 640 as it looked roughly 349 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).