It's time to examine the numbers to evaluate this volatile stock's trajectory after it climbed 350% in the past year.The space economy is a fascinating investment opportunity, but there are limited pure-play space stocks to choose from. Elon Musk's SpaceX is the industry leader by a wide margin, but it's not publicly traded. Rocket Lab USA (RKLB 1.40%) has emerged as a hot alternative. The stock has rocketed higher over the past year. Shares are down 40% from their high, and Rocket Lab is still up nearly 35 ...