The Twin Jet Nebula, or PN M2-9, is a striking example of a bipolar planetary nebula. Bipolar planetary nebulae are formed when the central object is not a single star, but a binary system, Studies have shown that the nebula’s size increases with time, and measurements of this rate of increase suggest that the stellar outburst that formed the lobes occurred just 1200 years ago.

The Twin Jet Nebula // Tvilling Nebulosan

Butterfly_death_throes

Butterfly death throes//Fjärilsdödskampen

The_Egg_Nebula

The Egg Nebula // Ägg Nebulosan

Cat Eye Nebula // Kattöga Nebulosan

Cat Eye Nebula // Kattöga Nebulosan

Horse Head Nebula // Hästhuvud Nebulosan

Horse Head Nebula // Hästhuvud Nebulosan

Alla bilder tagna från: http://www.esa.int/spaceinimages/content/search?SearchText=nebula&img=1&SearchButton=Go