NGC 856

NGC 856

NGC 856 is a spiral galaxy in the constellation Cetus about 280 million ly from Earth. It spans roughly 97,000 ly, about the width of our Milky Way. It is receding from us at about 5,995 km/s.

Illustration from its catalogued shape, not a photograph

Spiral
type · Sa
280 million ly
from Earth · from redshift
97k ly
across
16.5
apparent magnitude
5,995 km/s
receding (RC3)

Because its light is 280 million ly from home, you are seeing NGC 856 as it looked roughly 280 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 800Spiral14 million ly
apart
NGC 799Barred spiral17 million ly
apart
NGC 867Lenticular22 million ly
apart
NGC 934Elliptical22 million ly
apart
NGC 926Barred spiral24 million ly
apart
IC 234Barred spiral24 million ly
apart
Worlds in the same direction on the sky

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).

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