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Last updated 9:15 PM on 6/7/23
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21 Terms
1
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TRUE OR FALSE
1\.) The Milky Way is a spiral galaxy.
2\.) The orbits of Earth and the other planets around the Sun are not perfect circles.
3\.) The Sun is not part of the Milky Way.
4\.) Galaxies are composed of billions of stars.
5\.) Earth rotates around the Sun, which is the reason we see the Sun rise and set.
6\.) The Sun is a star.
7\.)Clouds, filaments, and walls are structures within galaxies.
1\.) The Milky Way is a spiral galaxy.
2\.) The orbits of Earth and the other planets around the Sun are not perfect circles.
3\.) The Sun is not part of the Milky Way.
4\.) Galaxies are composed of billions of stars.
5\.) Earth rotates around the Sun, which is the reason we see the Sun rise and set.
6\.) The Sun is a star.
7\.)Clouds, filaments, and walls are structures within galaxies.
1\.) The Milky Way is a spiral galaxy. **(T)**
2\.) The orbits of Earth and the other planets around the Sun are not perfect circles. **(T)**
3\.) The Sun is not part of the Milky Way. **(F)**
4\.) Galaxies are composed of billions of stars. **(T)**
5\.) Earth rotates around the Sun, which is the reason we see the Sun rise and set. **(F)**
6\.) The Sun is a star. **(T)**
7\.) Clouds, filaments, and walls are structures within galaxies. **(F)**
2\.) The orbits of Earth and the other planets around the Sun are not perfect circles. **(T)**
3\.) The Sun is not part of the Milky Way. **(F)**
4\.) Galaxies are composed of billions of stars. **(T)**
5\.) Earth rotates around the Sun, which is the reason we see the Sun rise and set. **(F)**
6\.) The Sun is a star. **(T)**
7\.) Clouds, filaments, and walls are structures within galaxies. **(F)**
2
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TRUE OR FALSE
1\.) A light-year is larger than an astronomical unit.
2\.) A light-year is the time light takes to travel one astronomical unit.
3\.) Scientific notation is used for very large numbers, but not very small numbers.
4\.) The distances to stars are measured in light years.
5\.) The metric system is more complex than the English system.
6\.) Astronomers use the metric system for calculations.
7\.) The astronomical unit is the distance across the solar system.
1\.) A light-year is larger than an astronomical unit.
2\.) A light-year is the time light takes to travel one astronomical unit.
3\.) Scientific notation is used for very large numbers, but not very small numbers.
4\.) The distances to stars are measured in light years.
5\.) The metric system is more complex than the English system.
6\.) Astronomers use the metric system for calculations.
7\.) The astronomical unit is the distance across the solar system.
1\.) A light-year is larger than an astronomical unit. **(T)**
2\.) A light-year is the time light takes to travel one astronomical unit. **(F)**
3\.) Scientific notation is used for very large numbers, but not very small numbers. **(F)**
4\.) The distances to stars are measured in light years. **(T)**
5\.) The metric system is more complex than the English system. **(F)**
6\.) Astronomers use the metric system for calculations. **(T)**
7\.) The astronomical unit is the distance across the solar system. **(F)**
2\.) A light-year is the time light takes to travel one astronomical unit. **(F)**
3\.) Scientific notation is used for very large numbers, but not very small numbers. **(F)**
4\.) The distances to stars are measured in light years. **(T)**
5\.) The metric system is more complex than the English system. **(F)**
6\.) Astronomers use the metric system for calculations. **(T)**
7\.) The astronomical unit is the distance across the solar system. **(F)**
3
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TRUE OR FALSE
1\.) Clouds, filaments, and walls are structures within galaxies.
2\.) Earth is about 4 times the diameter of the Moon.
3\.) The Sun is about 100 times the diameter of Earth.
4\.) Our galaxy is thousands of light-years across.
5\.) Our Solar system is one light-year across.
6\.) The solar system is part of our galaxy.
7\.) Galaxies are the largest objects in the universe.
1\.) Clouds, filaments, and walls are structures within galaxies.
2\.) Earth is about 4 times the diameter of the Moon.
3\.) The Sun is about 100 times the diameter of Earth.
4\.) Our galaxy is thousands of light-years across.
5\.) Our Solar system is one light-year across.
6\.) The solar system is part of our galaxy.
7\.) Galaxies are the largest objects in the universe.
1\.) Clouds, filaments, and walls are structures within galaxies. **(F)**
2\.) Earth is about 4 times the diameter of the Moon. **(T)**
3\.) The Sun is about 100 times the diameter of Earth. **(T)**
4\.) Our galaxy is thousands of light-years across. **(T)**
5\.) Our Solar system is one light-year across. **(F)**
6\.) The solar system is part of our galaxy. **(T)**
7\.) Galaxies are the largest objects in the universe. **(F)**
2\.) Earth is about 4 times the diameter of the Moon. **(T)**
3\.) The Sun is about 100 times the diameter of Earth. **(T)**
4\.) Our galaxy is thousands of light-years across. **(T)**
5\.) Our Solar system is one light-year across. **(F)**
6\.) The solar system is part of our galaxy. **(T)**
7\.) Galaxies are the largest objects in the universe. **(F)**
4
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What fraction of the celestial sphere is visible from any location on Earth?
half of the celestial sphere
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5
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What does the size of a dot represent about the star? On a diagram
The brightness of the star, as viewed from Earth
6
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Important things to know about Zenith and Horizon
1\.) Every observer at a different location on Earth has a unique zenith and horizon.
2\.) Two observers exactly opposite each other on Earth have the same horizon but different zeniths.
2\.) Two observers exactly opposite each other on Earth have the same horizon but different zeniths.
7
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True or False
1\.) The angular distance of the celestial north pole from the horizon is equal to half your latitude.
2\.) At one time or another all of the celestial sphere will be visible from a given location.
3\.) From knowing the angular distance between two stars on the celestial sphere one can find the actual distance between them.
4\.) The celestial sphere is still useful even though it is no longer accepted as physical reality.
5\.) The apparent rotation of the sphere is caused by Earth's rotation.
6\.) Precession is the slow shift in direction of the Earth's rotational axis, similar to the wobbling of a spinning top.
7\.) The celestial equator is an imaginary line in the sky directly above Earth's equator.
1\.) The angular distance of the celestial north pole from the horizon is equal to half your latitude.
2\.) At one time or another all of the celestial sphere will be visible from a given location.
3\.) From knowing the angular distance between two stars on the celestial sphere one can find the actual distance between them.
4\.) The celestial sphere is still useful even though it is no longer accepted as physical reality.
5\.) The apparent rotation of the sphere is caused by Earth's rotation.
6\.) Precession is the slow shift in direction of the Earth's rotational axis, similar to the wobbling of a spinning top.
7\.) The celestial equator is an imaginary line in the sky directly above Earth's equator.
1\.) The angular distance of the celestial north pole from the horizon is equal to half your latitude. **(F)**
2\.) At one time or another all of the celestial sphere will be visible from a given location. **(F)**
3\.) From knowing the angular distance between two stars on the celestial sphere one can find the actual distance between them. **(F)**
4\.) The celestial sphere is still useful even though it is no longer accepted as physical reality. **(T)**
5\.) The apparent rotation of the sphere is caused by Earth's rotation. **(T)**
6\.) Precession is the slow shift in direction of the Earth's rotational axis, similar to the wobbling of a spinning top. **(T)**
7\.) The celestial equator is an imaginary line in the sky directly above Earth's equator. **(T)**
2\.) At one time or another all of the celestial sphere will be visible from a given location. **(F)**
3\.) From knowing the angular distance between two stars on the celestial sphere one can find the actual distance between them. **(F)**
4\.) The celestial sphere is still useful even though it is no longer accepted as physical reality. **(T)**
5\.) The apparent rotation of the sphere is caused by Earth's rotation. **(T)**
6\.) Precession is the slow shift in direction of the Earth's rotational axis, similar to the wobbling of a spinning top. **(T)**
7\.) The celestial equator is an imaginary line in the sky directly above Earth's equator. **(T)**
8
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TRUE OR FALSE
1\.) The ecliptic is a real path that the sun actually follows.
2\.) The constellations that lie along the ecliptic are those of the zodiac.
3\.) The ecliptic's tilt is caused by the tilt of Earth's rotational axis.
4\.) In the summer the sun is higher in the sky than in the winter.
5\.) In the summer the sun is above the horizon longer than in the winter.
6\.) Due to the tilt of the ecliptic, the sun is only visible in the northern hemisphere for half the year and the southern hemisphere half the year.
7\.) Only the sun being higher in the sky causes warmer weather; the amount of time it is above the horizon has nothing to do with it.
1\.) The ecliptic is a real path that the sun actually follows.
2\.) The constellations that lie along the ecliptic are those of the zodiac.
3\.) The ecliptic's tilt is caused by the tilt of Earth's rotational axis.
4\.) In the summer the sun is higher in the sky than in the winter.
5\.) In the summer the sun is above the horizon longer than in the winter.
6\.) Due to the tilt of the ecliptic, the sun is only visible in the northern hemisphere for half the year and the southern hemisphere half the year.
7\.) Only the sun being higher in the sky causes warmer weather; the amount of time it is above the horizon has nothing to do with it.
1\.) The ecliptic is a real path that the sun actually follows. **(F)**
2\.) The constellations that lie along the ecliptic are those of the zodiac. **(T)**
3\.) The ecliptic's tilt is caused by the tilt of Earth's rotational axis. **(T)**
4\.) In the summer the sun is higher in the sky than in the winter. **(T)**
5\.) In the summer the sun is above the horizon longer than in the winter. **(T)**
6\.) Due to the tilt of the ecliptic, the sun is only visible in the northern hemisphere for half the year and the southern hemisphere half the year. **(F)**
7\.) Only the sun being higher in the sky causes warmer weather; the amount of time it is above the horizon has nothing to do with it. **(F)**
2\.) The constellations that lie along the ecliptic are those of the zodiac. **(T)**
3\.) The ecliptic's tilt is caused by the tilt of Earth's rotational axis. **(T)**
4\.) In the summer the sun is higher in the sky than in the winter. **(T)**
5\.) In the summer the sun is above the horizon longer than in the winter. **(T)**
6\.) Due to the tilt of the ecliptic, the sun is only visible in the northern hemisphere for half the year and the southern hemisphere half the year. **(F)**
7\.) Only the sun being higher in the sky causes warmer weather; the amount of time it is above the horizon has nothing to do with it. **(F)**
9
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What is responsible for the observed motion of a star along the celestial equator?
Earth's rotation on its axis.
10
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At what location on Earth is an observer that has the South Celestial Pole directly overhead?
At Earth's South Pole (90 degrees South latitude)
11
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At what location on Earth is an observer that has the Celestial Equator pass through the point directly overhead?
At Earth's equator (0° latitude)
12
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If the tilt of Earth's axis were to change from 23.5 degrees to 0 degrees, what celestial circles would coincide for all observers?
The Celestial Equator and the Ecliptic
13
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If you could see the sun and stars during the daytime for several weeks, you would notice that the sun does what?
Moves slowly eastward relative to the stars
14
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Why does the sun move relative to the stars as observed from Earth?
It is due to Earth revolving around the sun.
15
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Why is the amount of solar heating less on a clear day in January at northern latitudes than on a clear day in July?
Both the sun is above the horizon for less than 12 hours in January in the north and at low sun angles, the received sunlight is spread over a larger surface area.
16
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When it is autumn in Asia, what season is it in Antarctica?
Spring
17
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The five naked-eye planets and three telescopic planets that wander among the stars in the sky are always near which of the following?
Ecliptic
18
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Which of the following descriptions is a definition of an astronomical unit (AU)?
the average distance between Earth and the sun
19
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The way scientists know that a hypothesis in astronomy is a reasonable description of nature is to _____.
do experiments and observations about the predictions of the hypothesis
20
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By the term universe, astronomers mean _____.
everything that we can observe
21
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Which of the following is the Earth NOT located in?
we are located in all of the above