skywalker70

Good point. Thanks for replying. But how does a comet's coma start to form? As far as I am aware as comets drop in nearer to the Sun they start to vaporize, forming the tail. It is in that sense that I am looking.

Good day all

I need a list of boiling points of various elements in a vacuum but keep coming up with nothing on Google. Any help or pointers to reliable sources is apprecaited.

Thanks