IC 173

IC 173

Illustration from its catalogued shape, not a photograph

Barred spiral
type · SBbc
648 million ly
from Earth · from redshift
173k ly
across
14.1
apparent magnitude

Because its light is 648 million ly from home, you are seeing IC 173 as it looked roughly 648 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 177Barred spiral23 million ly
apart
IC 185Spiral47 million ly
apart
IC 1781Barred spiral54 million ly
apart
IC 186ALenticular60 million ly
apart
NGC 758Lenticular63 million ly
apart
IC 145Barred spiral70 million ly
apart
Worlds in the same direction on the sky

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).

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