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Rotation Revolution Axis Credit: Nate Kepler, Lenore Wilson, Katie Brown, Shuksan Middle School To turn or spin around a central point or axis. To move in a curved path around a central object, such as a star or a planet. An imaginary line that goes through the center of the earth from the north pole to the south pole. Satellite Orbit Solar System Credit: Nate Kepler, Lenore Wilson, Katie Brown, Shuksan Middle School A natural object that orbits another object in space. The curved path of an object around a central object in space. A system of planets or other bodies orbiting another star Galaxy Universe Credit: Nate Kepler, Lenore Wilson, Katie Brown, Shuksan Middle School Group of billions of stars and their planets, within the universe. All matter and energy, including galaxies, solar systems, and all of the contents of space. Star A sphere of hot glowing gases that releases energy in the form of heat and light. Planet A massive, spherical space object that orbits a star. (also, clears it’s neighborhood) Summer Solstice When the Earth’s axis (North) is tilted toward the sun (June 21st) Credit: Nate Kepler, Lenore Wilson, Katie Brown, Shuksan Middle School Winter Solstice When the Earth’s axis (North) it tilted away from the sun (December 21st) Equinox Two times of the year (fall or spring) when the north and south poles are equal distance from the sun. Comet A mass of frozen gas, cosmic dust, ice crystals, and organic material that orbits the sun. Credit: Nate Kepler, Lenore Wilson, Katie Brown, Shuksan Middle School Asteroid Meteoroid Meteor Credit: Nate Kepler, Lenore Wilson, Katie Brown, Shuksan Middle School A mostly rocky object that orbits the sun. Asteroids are larger than meteoroids. A solid object moving in space/ smaller than an asteroids. The streak of light (shooting star) that is produced when a meteoroid burns as it enters an atmosphere A meteoroid that strikes a planet Meteorite Moon Phases Waxing Credit: Nate Kepler, Lenore Wilson, Katie Brown, Shuksan Middle School The phase of the moon when it is getting larger in the sky, moving from the New Moon headed for the Full Moon. Moon Phases Waning The phases of the moon when it is getting smaller in the sky, moving from the Full Moon headed for the New Moon. Ellipse (Elliptical) The oval shaped path of a celestial body as it revolves around another object. Credit: Nate Kepler, Lenore Wilson, Katie Brown, Shuksan Middle School Lunar Eclipse When the Moon passes behind the Earth so that the Earth blocks the Sun's rays from hitting the Moon Solar Eclipse When the Moon passes in front of the Earth so that it blocks the Sun's rays from hitting the Earth. Crater Circular or oval depression on the surface of the moon or planet formed when an asteroid or comet strikes the surface at high speed. Credit: Nate Kepler, Lenore Wilson, Katie Brown, Shuksan Middle School