Intro to Astronomy Quiz 1. Which of the following statements about the celestial sphere is not true? The "celestial sphere" is just another name for our universe. 2. Which of the following statements is true? Both the Northern and Southern hemispheres receive the same amount of sunlight on the equinoxes. The Northern Hemisphere receives the most direct sunlight on the summer solstice. Both A and C are true. 3. What is the ecliptic? The Sun's apparent path along the celestial sphere 4. What conditions are required for a lunar eclipse? The phase of the Moon must be full, and the nodes of the Moon's orbit must be nearly aligned with Earth and the Sun. 5. All of the following statements are true. Which one explains the reason why there is not a solar eclipse at every new Moon? The orbital plane of the Moon is tilted by about 5° to the ecliptic plane. 6. Which of the following is not a phase of the Moon? Half Moon 7. Our solar system is located in the center of the Milky Way Galaxy. The correct answer is 'False'. 8. What conditions are required for a solar eclipse? The phase of the Moon must be new, and the nodes of the Moon's orbit must be nearly aligned with Earth and the Sun. 9. Why do we have seasons on Earth? As Earth goes around the Sun and Earth's axis remains pointed toward Polaris, the Northern and Southern hemispheres alternately receive more and less direct sunlight. 10. Which of the following statements about the ecliptic plane is not true? It is the plane of the Moon's orbit around Earth. 11. What is an astronomical unit? The average distance from Earth to the Sun 12. Earth is always precisely 1 AU from the Sun. The correct answer is 'False'. 13. In addition to the conditions required for any solar eclipse, what must also be true in order for you to observe a total solar eclipse? The Moon's umbra must touch the area where you are located. 14. What makes the North Star, Polaris, special? It appears very near the north celestial pole. 15. Why is it summer in the Northern Hemisphere when it is winter in the Southern Hemisphere? The Northern Hemisphere is tilted toward the Sun and receives more direct sunlight. 16. Why do we see essentially the same face of the Moon at all times? Because the Moon's rotational and orbital periods are equal 17. Which of the following statements about the Moon is true? The Moon's distance from Earth varies during its orbit. 18. Which of the following statements about the celestial equator is true at all latitudes? It represents an extension of Earth's equator onto the celestial sphere.