NGC 840
NGC 840
Illustration from its catalogued shape, not a photograph
Barred spiral
type · Sb
337 million ly
from Earth · from redshift
171k ly
across
13.4
apparent magnitude
Because its light is 337 million ly from home, you are seeing NGC 840 as it looked roughly 337 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 831Spiral11 million ly
apartNGC 810 NED02Elliptical34 million ly
apartNGC 791Elliptical38 million ly
apartIC 1817 NED02Spiral40 million ly
apartIC 1817 NED01Spiral40 million ly
apartNGC 810 NED01Elliptical42 million ly
apart
Worlds in the same direction on the sky→apartNGC 810 NED02Elliptical34 million ly
apartNGC 791Elliptical38 million ly
apartIC 1817 NED02Spiral40 million ly
apartIC 1817 NED01Spiral40 million ly
apartNGC 810 NED01Elliptical42 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).