NGC 161

NGC 161

NGC 161 is a lenticular galaxy in the constellation Cetus about 287 million ly from Earth. It spans roughly 110,000 ly, about the width of our Milky Way. The light reaching us tonight left it about 287 million years ago.

Illustration from its catalogued shape, not a photograph

Lenticular
type · S0
287 million ly
from Earth · from redshift
113k ly
across
14.4
apparent magnitude

Because its light is 287 million ly from home, you are seeing NGC 161 as it looked roughly 287 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 1557Lenticular900,000 ly
apart
NGC 106Spiral18 million ly
apart
IC 12Barred spiral19 million ly
apart
IC 25Lenticular20 million ly
apart
IC 1571Barred spiral20 million ly
apart
IC 8Elliptical21 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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