Throwing Snowballs at Xanadu

Betty and Sam are the luckiest System Searchers in the universe! After months of cataloguing solar systems, they discover the very first Earth-normal planet! But as they ponder oddities in the native species as well as the planet itself, they find not one, but two comets are about to hit their paradise! And it'll be an Extinction Level Event! What can they do? What will they do? And can they do it in time? Join Betty, Sam and Charlie, the ship's computer, as they race against the clock to save this pristine world from certain distruction! Science fiction adventure at its best!