Astronomers have for the 1st time spotted signs of water in Solar System which seems to be spraying off interstellar comet 2I/Borisov,as it’s flying towards the Sun on a journey from interstellar space — an important step towards understanding how water might travel between the stars.

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Umm…. I’m no expert or anything but haven’t we known for a while that comets spray water? That’s what the tail is… Right? So what’s new about this?


This is an example of someone posting a link to an article that they obviously didn’t read.


I know it’s a pretty established theory they water was delivered to earth via asteroid/meteor impacts, but how does the water survive the intense heat of entering the atmosphere and the heat generated from impact? Was the atmosphere thinner early on?