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20 Cards in this Set
- Front
- Back
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solstice
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when the sun reaches its highest or lowest point in the sky at noon, marked by the longest and shortest days.
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equinox
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the time or date at which the sun crosses the celestial equator, when day and night are of equal length.
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Project Mercury
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Project Mercury was the first human spaceflight program of the United States.
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Project Gemini
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Project Gemini was the second human spaceflight program of NASA, the civilian space agency of the United States government.
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Project Apollo
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The Apollo program was the United States spaceflight effort which landed the first humans on Earth's Moon.
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Reflecting Telescope
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a telescope in which a mirror is used to collect and focus light.
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Observatory
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a room or building housing an astronomical telescope or other scientific equipment for the study of natural phenomena.
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Ellipse
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a regular oval shape, traced by a point moving in a plane so that the sum of its distances from two other points is constant, or resulting when a cone is cut by an oblique plane that does not intersect the base.
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Comet
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a celestial object consisting of a nucleus of ice and dust and, when near the sun, a “tail” of gas and dust particles pointing away from the sun.
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orbit
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he curved path of a celestial object or spacecraft around a star, planet, or moon, esp. a periodic elliptical revolution.
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asteroid
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a small rocky body orbiting the sun.
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meteorite
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a meteor that survives its passage through the earth's atmosphere such that part of it strikes the ground.
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Mercury
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Mercury is the innermost and smallest planet in the Solar System.
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Venus
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Venus is the second planet from the Sun.
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Earth
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The earth is the third planet from the sun in the solar system, it is also the planet in which we live on.
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Mars
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a small, reddish planet that is the fourth in order from the sun.
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Jupiter
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the largest planet in the solar system, a gas giant that is the fifth in order from the sun and one of the brightest objects in the night sky.
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Saturn
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the sixth planet from the sun in the solar system, circled by a system of broad, flat rings.
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Neptune
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a distant planet of the solar system, eighth in order from the sun, discovered in 1846.
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Electromagnetic spectrum
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the range of wavelengths or frequencies over which electromagnetic radiation extends
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