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 Horse Head Nebula is a cloud of ionized- hydrogen in the constellation Orion. The clouds are lit from within by young hot stars. The interstellar dust absobs the light from part of ionized cloud creating this beautiful contrast
/ NGC Trifid Nebula in Sagittarius. Its name means 'divided into 3 lobes.' The object is an unusual combination of an open cluster of stars; an emission nebula; a reflection nebula & a dark nebula about 5200 light years away.
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.