... huge nebula is the prototype of what astronomers refer to as a "Giant HIIregion ... was the core of another giant HIIregion that has since dissolved into interstellar ...
... huge nebula is the prototype of what astronomers refer to as a "Giant HIIregion ... was the core of another giant HIIregion that has since dissolved into interstellar ...
... huge nebula is the prototype of what astronomers refer to as a "Giant HIIregion ... was the core of another giant HIIregion that has since dissolved into interstellar ...
... huge nebula is the prototype of what astronomers refer to as a "Giant HIIregion ... was the core of another giant HIIregion that has since dissolved into interstellar ...
... significant survey of so-called HII (read тАЬH-twoтАЭ) regions in the southern sky ... the shapes and textures of these HIIregions change as time passes, though over the ...
... visible and create glowing clouds in the surrounding material, known as HIIregions ... HIIregions shine because of the interaction of ultraviolet radiation given off by ... HIIregions can measure several hundred light-years in diameter, and the one ...
... surrounding hydrogen gas to glow with a rich red colour and become an HIIregion [3 ... is the #292 in the second Sharpless catalogue of HIIregions, published in 1959 ...