It's rude to ask a galaxy's age. Luckily, its shape offers a clue.


galaxies
Space

Younger galaxies appear flatter than their more well-rounded elders

Previous research suggested the 3-D shape of a galaxy may hold important hints about its history. Now astrophysicists find these shapes may reveal clues about the age of…
via Popular Science "https://ift.tt/2K7efiO"

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