The visible space is big, complex and can be incredibly beautiful.The sky (or celestial dome) is everything that lies a certain distance above the surface of the Earth, including the atmosphere and outer space.
The Eagle Has Risen: Stellar Spire in the Eagle Nebula. A billowing tower of gas and dust rises from the stellar nursery known as the Eagle Nebula. This small piece of the Eagle Nebula is 57 trillion miles long trillion km).
This image from Nasa's Spitzer Space Telescope shows a stellar nursery containing thousand of young stars & developing protostars near the sword of the constellation Orion. I heart the Spitzer space telescope.
Clump of active galactic cores that stretch 4 billion light-years from end to end. The structure is a light quasar group (LQG), a collection of extremely luminous Galactic Nulcei powered by supermassive central black holes.