Not a jellyfish. Nor a sperm. In fact, this is a cloud formed by a Russian Soyuz rocket as it rose through the thin air of near space on the morning of Tuesday 8 July. The cross, right at the top of the formation, was made by the Soyuz’s four boosters, as their plumes ballooned out in the thin air. [Roscosmos via New Scientist]

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Category: Calvin Pryor   I Heart Radio