Nebulae

Nebulae (singular nebula) are vast clouds of gas and dust found in interstellar space. Most of the nebulae found throughout the Frontier are "dark nebulae" that absorb the light of stars. Other types of nebulae that might be encountered are "emission nebulae" (bright clouds of gas and plasma found around young, hot stars), "reflection nebulae" (clouds of gas and dust that reflect the light of the young, cool stars they surround), and "planetary nebulae" (expanding spheres of gas that have been expelled from the surface of old, dying stars).