Beautiful pillar of dark dust and glowing gas, called the dark tower.

Another favorite image, a nebula nicknamed "The Dark Tower. It's a grand pillar of dark dust and glowing gas about 5000 lightyears away -- a region where new stars, planets, and maybe even BlueSky users are forming.
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Bumper sticker that says "Interstellar Matter is a Gas" (from the Astronomical Society of the Pacific

Here is another of the astronomical bumper stickers we developed at the nonprofit Astronomical Society of the Pacific in the 1980s.
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