Science: Solar System Study Guide Name: Axis: imaginary line through a spinning object. Earth is different from other planets: it has liquid water. Earth’s revolution around the sun: 365 1/4 days = 1 year Seasons: caused by its revolution and the tilt of the axis. Exploration: Began with ancient people noting the movement of the planets and stars. Galileo then invented the telescope and observed the planets more closely. Now powerful optical telescopes and radio telescopes, satellites, manned space missions, and space probes are providing more detailed information about our solar system and stars. Apollo 11, July 20, 1969 First mission when astronauts walked on the moon: When the moon gets dark as it passes through the Earth’s shadow. Eclipse: The Earth is between the moon and the sun. Moon’s cycle of phases: it takes the moon about 28-29 days to go through its cycle Phases: the different “shapes” of the moon caused by the reflection of the sun from Earth during its orbit around the Earth Planets: a large celestial object that moves around a star. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune Revolve (revolution): The movement of a planet around the sun or a moon around a planet. Rotate (rotation): The motion of a planet as it turns on its axis. It takes 24 hours for Earth to rotate one time. Satellite: an object that moves around another object in space; the moon is a satellite of the Earth; we send man-made satellites into orbit around the earth to aid in communication, explore the universe, and take pictures
Science: Solar System Study Guide Name: Axis: imaginary line through a spinning object. Earth is different from other planets: it has liquid water. Earth’s revolution around the sun: 365 1/4 days = 1 year Seasons: caused by its revolution and the tilt of the axis. Exploration: Began with ancient people noting the movement of the planets and stars. Galileo then invented the telescope and observed the planets more closely. Now powerful optical telescopes and radio telescopes, satellites, manned space missions, and space probes are providing more detailed information about our solar system and stars. First mission when astronauts walked on the moon: Apollo 11, July 20, 1969 Eclipse: When the moon gets dark as it passes through the Earth’s shadow. The Earth is between the moon and the sun. Moon’s cycle of phases: it takes the moon about 28-29 days to go through its cycle Phases: the different “shapes” of the moon caused by the reflection of the sun from Earth during its orbit around the Earth Planets: a large celestial object that moves around a star. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune Revolve (revolution): The movement of a planet around the sun or a moon around a planet. Rotate (rotation): The motion of a planet as it turns on its axis. It takes 24 hours for Earth to rotate one time. Satellite: an object that moves around another object in space; the moon is a satellite of the Earth; we send man-made satellites into orbit around the earth to aid in communication, explore the universe, and take pictures