Orbit - The path an object follows around another object., Revolution - The elliptical (oval) movement of an object around another object. This determines the length of a year., Rotation - The spinning motion of a planet on its axis. This determines the length of a day., Rotation Axis - The line on which an object rotates., Electromagnetic Spectrum - All the wavelengths of radiation (energy)., Solar system - A star & all objects in its orbit including planets, their moons, comets, and asteroids., Galaxy - A large collection of billions of stars moving through space., Universe - Space and everything in it, including all galaxies & solar systems., Telescopes - An instrument that collects and concentrates light and other electromagnetic radiation (ex. X-rays, infrared radiation, ultraviolet radiation), Rockets - A vehicle designed to propel itself by ejecting exhaust gas from one end., Satellites - Any small object that orbits a larger object in space, Space Probe - An uncrewed spacecraft sent from Earth to explore objects in space (orbiter, lander, and fly-by), Space Shuttle - Reusable spacecraft that transports people and materials to and from space., Space Station - Large Earth-orbiting satellite on which astronauts can live and work for long periods of time., Rover - Small robots that move around on a planet’s surface.,

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