NGC 240

NGC 240 is a lenticular galaxy in the constellation Pisces about 570 million ly from Earth. It spans roughly 220,000 ly, about 2.2 times the width of our Milky Way. The light reaching us tonight left it about 570 million years ago.

Because its light is 570 million ly from home, you are seeing NGC 240 as it looked roughly 570 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). Recession velocity from RC3 (de Vaucouleurs et al. 1991, via NASA/HEASARC, public domain). Distance computed by gravityfinder from redshift via Hubble's law (H0 = 70 km/s/Mpc).