Nebula
A nebula is a giant cloud of gas (mostly hydrogen and helium) and cosmic dust situated between stars in the interstellar medium. Nebulae serve as sites of stellar birth and death—including emission nebulae that glow from ionized gas, reflection nebulae that scatter starlight, and dark nebulae that obscure background stars.
Source: science.nasa.gov
APODs including "Nebula"
A Starry Night in Brazil
09/05/2009
This panoramic image tracing constellations in the southern sky shows off a beautiful vista toward the center of our Milky Way Galaxy. It was recorded just last month near the city of Campos in northeastern Rio de Janeiro state, Brazil. A sugar cane field from one of the historic region's local farms lies in the foreground. From left to right, the view sweeps across the Galactic Center in Sagittarius, bright stars in the tail of Scorpius, the South Celestial Pole above and right of the gap in the sugar canes, the dark Coalsack Nebula, and the Southern Cross. The closest star system, Alpha Centauri, and the giant Omega Centauri globular star cluster also shine in the starry night.