Astronomy honors unit 1 Appolloni – Flashcards
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June 21st. Ecliptic where sun is at its northernmost point and hitting the tropic of cancer
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What is the summer solstice?
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When sun is directly hitting tropic of capricorn and southernmost in the sky
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Winter Solstice?
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Sun is directly hitting equator. Every place on earth has equal night and day
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Vernal equinox?
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Sun is directly hitting equator. Every place on earth has equal night and day
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Autumnal equinox?
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one body orbits another
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What is Revolution?
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body spins on its axis
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What is Rotation?
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rotation of the earth's axis. 1 Full rotation 26,000
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Precession?
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Distance from sun to earth (93 million miles)
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Astronomical Unit?
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In 13,000 years summer constellations will be in winter
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Two things which change to precession?
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Distance light travels in a year.
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Light Year?
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4.23x10^9
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4,230,000,000 scientific notation?
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1.78x10^6
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178,900 in scientific notation?
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planet to planet (medium distance)
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When to use AU?
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The tropic regions
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What part of earth receives the most radiation?
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big distances like galaxys
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When to use light year?
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When a body's rotation and revolution periods match
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What is tidal locking?
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shadow is south
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You are standing on the Tropic of Capricorn on the Vernal Equinox.What direction would your shadow be cast?
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shadow is below
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You are standing on the Equator on the Autumnal Equinox. What direction would your shadow be cast?
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Length of time it takes for moon to go through phases. (29 days)
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What is a lunar month? How long?
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How long it takes for moon to revolve around the earth. (27 days)
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What is a sidereal month? How long?
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360 in an orbit divided by the # of days it takes for the moon to revolve around the sun. 360 ----- = 13 degrees per day 27
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How do you figure out how many degrees does the moon progresses every day?
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The axis's tilt
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What causes Earth's seasons?
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The poles
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What part of the Earth receives the least radiation?
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2nd full moon in a month
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What is a blue moon?
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Yes, in leap year
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Can a blue moon be in February ever?
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sun-->moon> shadow-- earth
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What is a solar eclipse? What does it look like?
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sun--> earth> shadow--moon
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What is a lunar eclipse? What does it look like?
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Arctic Circle Sunlight Darkness Summer 24 0 Winter 0 24 Autumn 12 12 Vernal 12 12
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For each of the solstices/equinoxes, how many hours of sunlight/darkness does the Arctic Circle receive?
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Antarctic Circle Sunlight Darkness Summer 0 24 Winter 24 0 Autumn 12 12 Vernal 12 12
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For each of the solstices/equinoxes, how many hours of sunlight/darkness does the Antarctic Circle receive.
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cancer 23.5n > Due to earths Capricorn 23.5s > tilt at 23.5 degree
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What latitude are the tropics located at? Why are they located there?
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Tidal locking
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Why do we only see one side of the moon?
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3x10^8 m/s
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What is the speed of light in m/s?
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May shows up 6 months after birthday month
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When does your Zodiac Constellation show up in the sky?
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Arctic Circle 66.3 degrees N Cancer 23.5 degrees north Equator 0 Capricorn 23.5 degrees s Antarctic circle 66.3 degrees S
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Draw an Earth with 5 latitude lines. Label the Tropic of Cancer, Tropic of Capricorn, Equator, Arctic Circle, and Antarctic Circle.
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small distances, like things on earth.
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When to use meters?
