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Prelude to galactic catastrophe

22 Feb 2019, 14:00 UTC
Prelude to galactic catastrophe NASA/ESA/ESO/Judy Schmidt

Here's a fun thing about galaxies: Sometimes they collide.

It's hard to imagine such a colossal event, a cataclysm on a scale a million trillion kilometers across. When it happens, the gravity of each galaxy grapples with the other, distorting their shapes, drawing out tens-of-thousands-of-light-years-long streamers of gas and stars, stretching toward each others like the yearning of a lover's arms.

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