If a galaxy is considered a stellar island, then a galaxy as big as the Andromeda galaxy must surely be a stellar continent. The Andromeda galaxy, designated M31 is the biggest galaxy in our local group. It’s about 220000 light years across, which means that it takes light to travel from the one end of the galaxy to the other whole 220000 years! In about 4.5 billion years from now, the Andromeda galaxy will drift towards us so much that the Milky Way will collide with it, forming the galaxy informally called Milkomeda.
Data: Jiří Žáček
Once a prospering and bright dot in the sky, only a faint cloud is remaining of it now. About 4500 BC, a gigantic star much more massive than our Sun exploded in a huge explosion, a supernova. The leftover is a relatively bright stellar ghost, a supernova remnant, called the Veil nebula. There are multiple brighter parts, this one being known as the Eastern Veil nebula, designated NGC6995.
150/600 Newton, Canon 350D, 4484s total exposure time, ISO1600, Data: Marián Mičúch
Deep inside our Galaxy, at its core, about 25000 light years from us, a gigantic glutton resides, destroying anything that comes too close to it. Many daring stars orbit it, some so closely that it takes only a few years to circle the black hole, Sagittarius A*. This exact part of the sky is however hidden in the visible spectrum by many dark nebulae spanning the Milky Way, called together the Great Rift.
20th July 2017, Canon 6D unmod, Sigma 24-70mm, 272s total exposure time from tripod, ISO8000, f2.8, Data: imaged by me