A look ahead

Emmanuel Joly from Le Cannet-des-Maures, France Sharpless 2–216 is one of the closest planetary nebulae to Earth, just 415 light-years away in Perseus. On the sky, it has a diameter three times larger than that of the Full Moon. Of course, the term “planetary nebula” is a misnomer — such objects are actually produced by starsContinue reading “A look ahead”
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