This Hubble Space Telescope (HST) image reveals a pair of one-half light-year long interstellar 'twisters' - eerie funnels and twisted-rope structures - in the heart of the Lagoon Nebula (Messier 8) which lies 5,000 light-years away in the direction of the constellation Sagittarius.
Most nebulae is widespread and that means that they are very large and do not have well-defined boundaries. In visible light, these nebulae can be divided in emission nebulae and reflection nebulae based on how you create the light we see. The emission nebulae contain ionized gas (mostly ionized hydrogen) that produces spectral lines of emission. They are often called H II regions derived from the language of the professional astronomers referring ionized hydrogen.
Cotton Candy Nebula - The nebula known as N11, complete with sparkly star clusters embedded in fluffy pink clouds of gas. This exceptionally energetic star-forming region, also known as the Bean Nebula, extends over 1,000 light-years in the Large Magellanic Cloud. Three generations of star formation have created shells of gas and dust which are being blown away by radiation from the newborn stars.