Vocabulary
planet, comet, sun, solar system, Earth, Mercury, Jupiter, Saturn, Venus, Mars, Uranus, Saturn, Neptune, moon, telescope, planets, moon, interior, exterior, orbit, solar system, inner planets, rover, satellites, asteroid belt, dwarf planets, meteorites, telescope, gravitational force, orbit, comet, elliptical trajectory, gravity, inertia, solar system, nebula, sun, planet, dwarf planet, asteroid, meteor, comet, nebular theory, star, gravitational force, solar system sun, moon, asteroid, meteor, gravitational pull, Neptune, Earth, Mercury, Venus, Mars, Uranus, Jupiter, Saturn, satellite, planet, comet, sun, solar system, Earth, Mercury, Jupiter, Saturn, Venus, Mars, Uranus, Saturn, Neptune, moon, telescope, planets, moon, interior, exterior, orbit, solar system, inner planets, rover, satellites, asteroid belt, dwarf planets, meteorites, telescope, gravitational force, orbit, comet, elliptical trajectory, gravity, inertia, solar system, nebula, sun, planet, dwarf planet, asteroid, meteor, comet, nebular theory, star, gravitational force, planet, comet, sun, solar system, Earth, Mercury, Jupiter, Saturn, Venus, Mars, Uranus, Saturn, Neptune, moon, telescope, planets, moon, interior, exterior, orbit, solar system, inner planets, rover, satellites, asteroid belt, dwarf planets, meteorites, telescope, gravitational force, orbit, comet, elliptical trajectory, gravity, inertia, solar system, nebula, sun, planet, dwarf planet, asteroid, meteor, comet, nebular theory, star, gravitational force, planets, moon, interior, exterior, orbit, solar system, inner planets, rover, satellites, asteroid belt, dwarf planets, meteorites, telescope, gravitational force, orbit, comet, elliptical trajectory, gravity, inertia, solar system, nebula, sun, planet, dwarf planet, asteroid, meteor, comet, nebular theory, star, gravitational force, solar system, inner planets, rover, satellites, asteroid belt, dwarf planets, meteorites, telescope, gravitational force, orbit, comet, elliptical trajectory, gravity, inertia, solar system, nebula, sun, planet, dwarf planet, asteroid, meteor, comet, nebular theory, star, gravitational force, gravity, inertia, solar system, nebula, sun, planet, dwarf planet, asteroid, meteor, comet, nebular theory, star, gravitational force, solar system, planets, inner planet, gas giants, asteroids, comets, sun, hydrogen, helium