Rocket Lab's medium-lift rocket, scheduled to launch next year, could open up big revenue opportunities.Space companies have created exciting new possibilities for space travel and exploration. These companies have slashed launch costs, landed reusable rockets, built massive satellite constellations, and made commercial spaceflight a reality.Not only that, NASA is investing in long-term exploration and scientific research, and the Artemis Program is one of its initiatives that looks to send humans back to t ...