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29 Cards in this Set
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astronomy
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The study of the moon, stars and other objects in space.
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https://o.quizlet.com/4was7JOOb0tGyVlcyC0OkA.jpg
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asteroids
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objects that are revolving around the sun that are to small and too numerous to be considered planets.
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https://o.quizlet.com/PPbxlWRcBzyVoyIkl4erIw.jpg
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comet
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a ball of ice and dust whose orbit is a long, narrow ellipse.
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https://farm3.staticflickr.com/2827/10346759605_704d8b5428.jpg
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galaxy
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A giant structure that contains hundreds of billions of stars.
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https://farm2.staticflickr.com/1061/5122914727_22f167bca1.jpg
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gas giants
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The name given to the first four outer planets: Jupiter, Saturn, Uranus, and Neptune.
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https://o.quizlet.com/2Xh0q2WeNabsuOJm6CUDew.jpg
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giant star
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A very large star, much larger than the sun.
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https://o.quizlet.com/vKj7eEYSKYPV3D9XfPKADA.jpg
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gravity
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The attractive force between two objects; the amount of force depends on their masses and the distance between them.
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https://o.quizlet.com/sHT1fRm1RKTyqQtLxZU8ww.jpg
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light year
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The distance that light travels in one year.
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https://o.quizlet.com/5Utvt05JE-.y95eTI-E8vQ.jpg
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meteor
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a streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere.
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https://farm3.staticflickr.com/2755/4111291263_9b8ac0b6bf.jpg
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meteorite
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a meteoroid that has hit Earth's surface.
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https://farm1.staticflickr.com/8/10188485_e4cab74d9c.jpg
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nuclear fusion
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The process by which hydrogen atoms join together to form helium, releasing energy.
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https://o.quizlet.com/TeuZrYXp3jLiV2UCehhM6w.jpg
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orbit
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The path of an objects as it revolves around another object in space.
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https://o.quizlet.com/faRYkF4QOnszEb9C9f7wQg.jpg
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revolution
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The movement of an object around another object.
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https://o.quizlet.com/tr.yzi9Q7M-6M.4-6eU9Xg.jpg
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rotation
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The spinning motion of a planet about its axis.
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https://o.quizlet.com/Fo48pkh4gcO7sy-d-xzwVA.jpg
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axis
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An imaginary line that passes through Earth's center and the North and South poles, about which Earth rotates.
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https://o.quizlet.com/pvNhZ7GifqMvDMLsBJskVA.jpg
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equinox
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The two days of the year on which neither hemisphere is tilted toward or away from the sun.
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https://o.quizlet.com/N5j.-F8M7oDU8o3GWJnHcw.jpg
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solstice
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The two days of the year on which the noon sun is directly overhead at either 23.5 degrees South or 23.5 degrees North.
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https://o.quizlet.com/YVs5Lx.yadXuQZ7LY01gMw.jpg
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The Big Bang Theory
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The theory that the universe formed in an enormous explosion about 10 to 15 billion years ago.
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https://o.quizlet.com/BeIK7NEBmbrs8uVtM22MsA.jpg
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spectrograph
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An instrument that separates light into colors and photographs the resulting spectrum.
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https://o.quizlet.com/GcHmTBuojF1cIW1cQwkwPg.jpg
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spectrum
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The range of wavelengths of electromagnetic waves.
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https://o.quizlet.com/Be4..KFw1dMOOGu.MBxWxA.jpg
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constellation
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A pattern of stars in the sky.
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https://o.quizlet.com/lX0HIAQBpxHs8VIqahms7Q.jpg
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crater
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a round pit on the moon's surface.
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https://o.quizlet.com/Uj3Jul87oK2.k.MTfsxeng.jpg
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eclipse
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The partial or total blocking of one object by another.
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https://farm4.staticflickr.com/3446/3749824749_2561a36d12.jpg
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lunar eclipse
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The blocking of sunlight to the moon that occurs when Earth is directly between the sun and moon.
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https://farm1.staticflickr.com/149/409738449_75aa055c87.jpg
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penumbra
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The part of a shadow surrounding the darkest part.
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https://o.quizlet.com/dy5rNQBAt.vK7EUTQZqOkw.jpg
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solar eclipse
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The blocking of sunlight to Earth that occurs when the moon is between the sun and Earth.
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https://farm6.staticflickr.com/5199/7237434096_4178971ac9.jpg
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tide
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The rise and fall of the level of water in the ocean.
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https://o.quizlet.com/o3BlLpg6ZWqwmJOw8QI8MA.jpg
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umbra
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The darkest part of a shadow.
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https://o.quizlet.com/dy5rNQBAt.vK7EUTQZqOkw.jpg
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universe
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All of space and everything in it.
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https://o.quizlet.com/63YcGS.eDT7t7MpY9KxaLQ.jpg
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