xkcd

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submitted 2 months ago by [email protected] to c/[email protected]

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It was great until my thumb slipped and I accidentally launched my telescope into the air at Mach 8.

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[–] [email protected] 14 points 2 months ago (9 children)

"Sidereal" pronounced /saɪˈdɪəriəl, sə-/ sy-DEER-ee-əl, sə-

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