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28 Cards in this Set
- Front
- Back
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The spinning of the Earth around its axis. It takes 24 hours to rotate 1 time. The spinning is the reason for night and day.
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rotation
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The movement of the Earth around the Sun. It takes 365.25 days or 1 year to make a complete orbit.
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revolution
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The first day of summer. The longest day of the year. The North Pole is pointing toward the sun.
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summer solstice
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The first day of winter. The shortest day of the year. The North Pole is pointing away from the sun.
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winter solstice
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The shadow produced by the moon passing between the Sun and the Earth.
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solar eclipse
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The shadow on the moon produced by the Earth passing in front of the Sun.
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lunar eclipse
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Study of stars, planets, and other objects that make up the universe.
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astronomy
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All of space and everything in it.
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universe
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A group of stars, gas, and dust held together by gravity.
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galaxy
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The Sun and all the objects that travel around it. It lies near the edge of the Milky Way galaxy.
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Solar System
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The galaxy where our Solar System exists.
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Milky Way
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Distance light can travel in 1 year.
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light year
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The path taken by one celestial body in its revolution about another.
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orbit
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The average distance from the Earth to the Sun.
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AU - astronomical unit
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An man-made object that is launced into space to gather information and send it back to Earth.
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artificial satellite
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Glowing balls of gases that live millions and millions of years. A star uses its gases, hydrogen and helium, to produce light and hear.
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stars
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Group of stars within a particular region of the sky that form a pattern.
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constellation
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Center of our solar system.
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Sun
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Bodies that orbit the sun and produce no light but reflect the sunlight.
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planets
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Fuzzy star that travels around the Sun in an oval path. Its center is made of frozen gases and frozen water mixed with dust.
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comet
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Solar fragments made of rock and metal that revolve around the Sun between the orbits of Mars and Jupiter.
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asteroid
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Smaller chunk of an asteroid that has broken off and fallen into the Earth's atmosphere.
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meteoroid
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The name of the inner planets; Mercury, Venus, Earth, and Mars.
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terrestrial planets
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The name of the outer planets; Jupiter, Saturn, Uranus, Neptune, and Pluto
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jovian planets
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The first day of autumn. The North Pole begins to point away from the Sun.
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autumnal equinox
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The first day of spring. The North Pole begins to point toward the Sun.
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vernal equinox
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The area in which the shadow of an object is partial.
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penumbra
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The area in which the shadow of an object is total.
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umbra
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