![]() ![]() Every satellite has a main bus -the body of the spacecraft-that holds all its electronics and computers. Satellites are unpiloted and unmanned, but they carry many scientific instruments and tools to collect information. Satellites are fly-by or orbiting spacecraft that gather scientific information about planets, moons, and the Sun from a distance, allowing large areas to be studied. Rovers land on a surface like landers do, but instead of staying at the same place, they travel to a variety of locations to make observations and collect samples. Landers make observations from one location on the surface of a planet, moon, or space object and do complex, in-depth science using sensitive equipment. Each type of explorer has its merits and limitations, so they are used for different purposes when studying planets. Generally, they use three types of robotic explorers: landers, rovers, and satellites. Scientists have several ways to study the solar system and beyond. ![]() ![]() In this activity, you’ll design your own space probe to study the Sun! NASA and other space agencies have designed and built hundreds of unmanned spacecraft, including satellites, probes, telescopes, and other devices to learn more about space. Because the distances to travel are so huge, they rely on unmanned spacecraft to collect data and send it back to Earth. ![]() Even as we explore the Sun and nearby planets, scientists and engineers are looking for ways to study stars, planets, moons, and galaxies far beyond our solar system. ![]()
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