Officials at NASA are no doubt both excited and nervous as the agency gets ready for the debut of its most powerful rocket ever, dubbed the "mega moon rocket." The vehicle is officially known as th… [+6320 chars]
Sign up for CNNs Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Space can be a violent place. Objectscrash into each o… [+5152 chars]
