What%20holds%20galaxies%20together%3F%20Would%20Saturn%20float%20in%20a%20bathtub%3F%20How%20do%20astronauts%20use%20the%20toilet%3FYoung%20astronomers%20can%20find%20out%20the%20answers%20to%20all%20their%20questions%20about%20space%20on%20this%20wild%20ride%20through%20the%20solar%20system%20.%20.%20.%20and%20beyond!%20Discover%20how%20the%20stars%20got%20started%20and%20how%20the%20universe%20is%20growing.%20Blast%20off%20on%20amazing%20space%20missions%2C%20then%20plunge%20to%20the%20center%20of%20our%20very%20own%20planet%20Earth.Along%20the%20way%2C%20learn%20outer%20space%20jokes%20to%20tell%20your%20friends.%20The%20sky’s%20the%20limit!Quirky%2C%20colorful%2C%20and%20educational!Question-and-answer%20format%20breaks%20down%20information%20into%20manageable%20chunks.Informal%2C%20kid-friendly%20language%20is%20breezy%20and%20fun.Ages%207%20and%20up.Sturdy%20hardcover%20binding.Book%20measures%206”%20wide%20x%209”%20high.48%20pages.