NASA scientists are researchers and experts who work for the National Aeronautics and Space Administration. They study various aspects of space, including planets, stars, and galaxies, to understand the universe better. Their work often involves conducting experiments, analyzing data, and developing new technologies for space exploration. These scientists come from diverse fields such as astronomy, physics, and engineering. They collaborate on missions like the Mars Rover and the Hubble Space Telescope, aiming to gather information that can help answer fundamental questions about our solar system and beyond.