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22 Cards in this Set
- Front
- Back
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stars
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huge, distant bodies
much larger than planets and much farther from Earth |
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red stars
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cooler stars
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blueish white stars
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hotter stars
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yellow stars
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in-between hotter and cooler stars
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blackhole
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when a giant star dies and its gravity is so strong because of its density that it drags everything toward itself-including light
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Stars are faraway suns.
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The stars are in the sky during the daytime, too.
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If the big stars should come as close to earth as our sun, they would look a lot larger.
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If our sun were as far away as any of the other stars, it would look like a little point of light.
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How many stars are there in outer space?
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No one really knows for sure.
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galaxy
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vast collection of stars
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Our sun is in the galaxy we call the
Milky Way. |
Stars' distances are measured in light years.
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Proxima Centauri
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our nearest star neighbor
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Why do stars appear to twinkle?
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As a star's light passes through the atmosphere it is bent and broken up by changes in the temperature.
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Why don't stars twinkle in outer space?
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They just appear to twinkle because the pockets of warm and cold air in our atmosphere bend and distort their light.
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How can we tell stars from planets in the night sky?
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Their positions in the sky.
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Both planets and stars are very far away from us;but planets are much closer to us than all of the stars in our solar system, except for the sun.
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Planets are smaller than stars and circle around the sun.
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The sun is an average-sized star.
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Some stars are larger than the sun, some are smaller, and many are the same size.
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What is a planet?
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a large spinning body of gases, or rock and metal that moves in an orbit around a star.
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Planets do not produce any light of their own.
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Planets were named this because they seem to wander across the night sky.
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The word ______ comes from the greek "planetas", meaning "wanderer".
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planet
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_____________ are names used originally for groupings of stars that seem to form patterns in the sky.
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Many constellations were named after gods, animals, and people.
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The stars in a constellation aren't necessarily close to one another in outer space; but from our viewing angle they seem to be close together.
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There are 88 constellations.
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Constellations are grouped according to the season when they are best observed.
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Constellations
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