NGC 1821
NGC 1821
Illustration from its catalogued shape, not a photograph
Irregular
type · I
170 million ly
from Earth · from redshift
62k ly
across
13.9
apparent magnitude
Because its light is 170 million ly from home, you are seeing NGC 1821 as it looked roughly 170 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.
Nearest galaxies
IC 400Galaxy9.6 million ly
apartIC 415Galaxy13 million ly
apartNGC 1723Spiral16 million ly
apartNGC 1728Spiral17 million ly
apartNGC 1730Spiral17 million ly
apartNGC 1739Barred spiral19 million ly
apart
Worlds in the same direction on the sky→apartIC 415Galaxy13 million ly
apartNGC 1723Spiral16 million ly
apartNGC 1728Spiral17 million ly
apartNGC 1730Spiral17 million ly
apartNGC 1739Barred spiral19 million ly
apart
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).