IC 4358

IC 4358 is a barred spiral galaxy in the constellation Virgo about 155 million ly from Earth. It spans roughly 63,000 ly, about 63% of our Milky Way's width. The light reaching us tonight left it about 155 million years ago.

Because its light is 155 million ly from home, you are seeing IC 4358 as it looked roughly 155 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).