Dear astronomers of Twitter, is it supposed to be a disk or a disc, or is that entirely dependent on the type of En… https://t.co/nZFUTJ5PUI 0 atbildes

	Signe Dean (2018-05-09 09:28:22) @twitter	Dear astronomers of Twitter, is it supposed to be a disk or a disc, or is that entirely dependent on the type of En… https://t.co/nZFUTJ5PUI