British start-up Spacebit. It has sensors that can take measurements and collect exploration data for researchers to analyze. The robot also comes equipped with cameras — one of which can take “robot selfies” — and can withstand big swings in temperature, from 130 degrees Celsius (266 degrees Fahrenheit) in the day to minus 130 degrees Celsius at night. It will also eventually be able to navigate through so-called lunar lava tubes, which are tunnels beneath the surface of the moon thought to have once been filled with lava. Spacebit says this is something that hasn’t been achieved before. The company...