NGC 21
NGC 21
Illustration from its catalogued shape, not a photograph
Barred spiral
type · Sbc
221 million ly
from Earth · from redshift
89k ly
across
13.4
apparent magnitude
Because its light is 221 million ly from home, you are seeing NGC 21 as it looked roughly 221 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
NGC 13Barred spiral2.9 million ly
apartNGC 19Barred spiral3.4 million ly
apartNGC 43Lenticular9.8 million ly
apartNGC 7836Elliptical9.9 million ly
apartNGC 39Spiral10 million ly
apartNGC 6Elliptical11 million ly
apart
Worlds in the same direction on the sky→apartNGC 19Barred spiral3.4 million ly
apartNGC 43Lenticular9.8 million ly
apartNGC 7836Elliptical9.9 million ly
apartNGC 39Spiral10 million ly
apartNGC 6Elliptical11 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).