Is it more like a border, or a kind of inconceivably vast ceiling? Is there even a border/ceiling up there at all?
from gizmodo http://www.gizmodo.co.uk/2019/02/whats-at-the-edge-of-the-universe/
from gizmodo http://www.gizmodo.co.uk/2019/02/whats-at-the-edge-of-the-universe/
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