text:   A-type star: A sign of collisions between rocky planets?",4,"['New paper that I was involved with out today\n\nFirst detection of a disk free of volatile elements around a young A-type star: A sign of collisions between rocky planets?\n\n<LINK>', 'In this paper we find odd material around a young star. It has lots of refractories elements (stuff usually in rocks) but no volatiles (stuff we usually find as gas in discs around stars). \n\nThe only other place we see this is planetary debris around much older white dwarfs', 'so what has happened? Its still somewhat uncertain, though one compelling possibility is that two young planets have collided and what we are seeing is the debris from this', '@davecl42 How had I not thought of that before!']",21,05,670