NASA has shared a mind-blowing image of a spiral galaxy – and it has a secret meaning. On Sunday, the US space agency took to Twitter to share an image of a stunning galaxy known as Messier 51 (M51), ...
The sprawling and hypnotically symmetrical 'whirlpool galaxy' Messier 51 is so large and so bright that even at its vast distance away, somewhere between 23 and 31 million light-years from Earth, even ...
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