Questions and Answers
What will be the result if all the suns are placed into one photograph?
Figure eight
In New York City, what is the shortest day of the year?
Winter solstice
What is the length of time the Sun is above the horizon called?
Duration of insolation
What causes the moon's phases?
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How long is the moon's orbit around the Earth?
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What unit of measurement is used to denote the distance between two stars in the sky?
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Why could sailors steer their ships using the North Star before there was GPS?
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What is the brightness of the Milky Way Galaxy primarily due to?
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What shape is the Milky Way Galaxy?
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Where is the center of the universe located?
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Which discovery revealed that the universe contains many structures composed of millions of stars?
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What is the direction of the Earth's North Pole on the summer solstice?
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What two days of the year have equal hours of day and night?
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What causes the sun to rise and set every day?
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What does 'degree of insolation' measure?
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What is the general apparent direction that stars move across the sky at night in the Northern Hemisphere?
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What is the general apparent direction that stars move across the sky at night in the Southern Hemisphere?
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What causes the stars in the night sky to appear to move?
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What do we believe is at the center of the Milky Way?
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Which of these can be described as a system of stars, gases, dust, and other matter that orbits a common center of gravity?
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Study Notes
Solar Observations and Measurements
- A year-long study results in a figure-eight pattern when photographing the sun daily.
- The shortest day in New York City occurs during the winter solstice.
- Duration of insolation refers to how long the sun stays above the horizon.
Lunar Phases and Motion
- The moon's phases are influenced by its orbit around Earth and its reflection of sunlight.
- The moon takes approximately one month to complete its orbit around Earth.
Star Measurements and Navigation
- Degrees are the units used to measure distances between stars in the sky.
- The North Star serves as a reliable navigation point since it remains fixed in the sky.
Structure of the Milky Way Galaxy
- The Milky Way Galaxy appears bright due to a large number of stars.
- Its shape is classified as spiral.
- At the center of the Milky Way, a black hole is believed to exist.
Cosmic Structure and Observations
- The universe is made up of galaxies, which are systems of stars, gas, dust, and other matter orbiting a center of gravity.
- There is no defined center of the universe.
Celestial Events and Earth’s Movement
- During the summer solstice, Earth's North Pole is tilted towards the sun.
- Spring and Fall equinoxes have equal hours of day and night.
- The rotation of Earth causes the daily rise and set of the sun.
Star Movement in the Sky
- Stars appear to move from east to west in both the Northern and Southern Hemispheres.
- The perceived movement of stars is a result of Earth's rotation and its orbit around the sun.
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Description
Explore the fascinating world of astronomy with these flashcards focusing on the universe and stars. Each card covers a unique aspect, such as solar phenomena and seasonal changes. Perfect for anyone looking to enhance their knowledge of celestial events!
