Reposted by Jonathan Sollars

The Squid Nebula (Ou4), discovered in 2011, spans nearly three full moons in the sky. Likely 2,300 light-years away within Sh2-129, it appears as a blue bipolar shape from ionized oxygen. Powered by the triple-star system HR8119, it may stretch over 50 light-years.
Credit & Copyright: Alex Linde