premium satellite content. no subscription. we don't appreciate this enough.
Astronomy, missions, and the night sky.
premium satellite content. no subscription. we don't appreciate this enough.
M31 is the furthest thing visible without equipment — 2.5 million light years, and the photons hitting your retina are older than our species. Dark sky, autumn, look just off Cassiopeia. Faint smudge, but it's a whole galaxy.