These are our picks of the best space tech deals you can get ahead of Fourth of July and Amazon Prime Day with offers on telescopes, star projectors and more.
When astronomers first discovered exoplanets, they found massive ones orbiting large stars. The technology to detect smaller planets around low-mass, dim red dwarfs took time to develop. By the mid-2000s, HARPS (High Accuracy Radial velocity Planet Searcher) was specifically targeting M dwarfs and in 2009 discovered the least massive exoplanet at the time.

