The Carina Nebula (catalogued as NGC also known as the Grand Nebula, Great Nebula in Carina, or Eta Carinae Nebula) is a large, complex area of bright and dark nebulosity in the constellation Carina, and is located in the Carina–Sagittarius Arm.
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.
NASA Butterfly Nebula (NGC Located in the constellation Scorpius, the structure of this nebula is one of the most fragile and complex that has ever been studied. The butterfly shape has lead scientists to name it's structure a "bipolar structure.
The Horsehead Nebula is a cloud of ionized-hydrogen in the constellation Orion. These clouds are lit from within by young, hot stars. The interstellar dust absorbs the light from part of the ionized cloud creating this beautiful contrast. Image Credit: NA
Jewel of the southern sky, the Great Carina Nebula, also known as NGC 3372, spans over 300 light-years, one of our galaxy's largest star forming regions. Like the smaller, more northerly Great Orion Nebula, the Carina Nebula is easily visible to the unaided eye, though at a distance of 7,500 light-years it is some 5 times farther away.