APOD from 2025-09-10

The Great Lacerta #Nebula

The Great Lacerta Nebula (Sh2-126), similar in size to the Andromeda #Galaxy, is a faint emission nebula best viewed through long-exposure photography. It spans about three degrees in the constellation Lacerta and glows red from hydrogen excited by star 10 Lacertae, lying around 1,200 light-years away.

HD image at https://apod.nasa.gov/apod/ap250910.html#space #astronomy #telescope #universe