Coronado Varsity Astronomy: "The Celestial Sphere"....Poundstradamus

30 Questions | Total Attempts: 277

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Astronomy Quizzes & Trivia

In astronomy and navigation, the celestial sphere is an abstract sphere with an arbitrarily large radius concentric to Earth. All objects in the sky can be conceived as being projected upon the inner surface of the celestial sphere, which may be centered on Earth or the observer. Test your knowledge of the sphere with the test below.


Questions and Answers
  • 1. 
    The object in the center of the celestial sphere is the....
    • A. 

      North celestial pole

    • B. 

      Sun

    • C. 

      Earth

    • D. 

      Celestial axis

  • 2. 
    The circle on the celestial sphere midway between the north and south celestial poles is the...
    • A. 

      Celestial equator

    • B. 

      Ecliptic

    • C. 

      Celestial horizon

    • D. 

      Horizon

  • 3. 
    The points on the celestial sphere directly above the Earth's poles are....
    • A. 

      Zenith

    • B. 

      The equinoxes

    • C. 

      Right ascension

    • D. 

      The celestial poles

  • 4. 
    The boundary between the ground and the sky
    • A. 

      Equator

    • B. 

      Celestial meridian

    • C. 

      horizon

    • D. 

      Altitude

  • 5. 
    To locate the positon of a star in the sky, what is the coordinate measured around the horizon from zero meridian called...
    • A. 

      Right ascension

    • B. 

      Declination

    • C. 

      Azimuth

    • D. 

      Altitude

  • 6. 
    The imaginary point in the northern sky around which the stars seem to circle here in El Paso is .....
    • A. 

      North celestial pole

    • B. 

      Polaris

    • C. 

      North pole

    • D. 

      North Star

  • 7. 
    At the North Pole, throughout the night, the stars...
    • A. 

      Rise straight up in the east and set straight down in the west

    • B. 

      Rise straight up in the west and set straight down in the east

    • C. 

      circle around the sky parallel to the horizon

    • D. 

      Set at 5:36 a.m. in the Summer months only

  • 8. 
    At the equator, throughout the night, the stars...
    • A. 

      Rise straight up in the east and set straight down in the west

    • B. 

      Rise straight up in the west and set straight down in the east

    • C. 

      Have equal amounts of darkness in the Summer months only

    • D. 

      circle around the sky parallel to the horizon

  • 9. 
    The circle around the celestial sphere which is the Sun's apparent track during the year as viewed from the Earth ...
    • A. 

      Ecliptic

    • B. 

      Ecliptic plane

    • C. 

      Celestial equator

    • D. 

      equinox

  • 10. 
    The approximate date of the winter solstice for El Paso is....
    • A. 

      Mar. 21

    • B. 

      Dec. 21

    • C. 

      June 21

    • D. 

      Depends on which hemisphere one is in

  • 11. 
    The approximate date of the winter solstice for Australia is....
    • A. 

      Mar. 21

    • B. 

      Dec. 21

    • C. 

      June 21

    • D. 

      Depends on which hemisphere one is in

  • 12. 
    Precession causes the north celestial pole to move around the celestial sphere (with respect to the fixed stars)
    • A. 

      Back and forth along an arc

    • B. 

      In a large ellipse pattern every 100 thousand years

    • C. 

      Along the ecliptic

    • D. 

      In a large circular pattern that takes 26 thousand years to complete

  • 13. 
    The approximate date of the winter solstice for Earth is....
    • A. 

      Mar. 21

    • B. 

      Dec. 21

    • C. 

      June 21

    • D. 

      Depends on which hemisphere one is in

  • 14. 
    An imaginary sphere surrounding the earth on which all objects in the sky can be located, is called the ....
    • A. 

      Constellation belt

    • B. 

      Oort Cloud

    • C. 

      Celestial sphere

    • D. 

      Heliosphere

  • 15. 
    Which of the following is not an alternate name for the North Star
    • A. 

      Polaris

    • B. 

      Pole Star

    • C. 

      North Pole

    • D. 

      All answers are correct

  • 16. 
    A point directly overhead always 90o from your horizon 
    • A. 

      Zenith

    • B. 

      North Celestial Pole

    • C. 

      Altitude

    • D. 

      Polaris

  • 17. 
    An imaginary line running north & south through the zenith
    • A. 

      Right ascension

    • B. 

      Declination

    • C. 

      Meridian

    • D. 

      North and South Celestial Pole

  • 18. 
    Which of the following is not characteristic of the North Star...
    • A. 

      It is a "pulsing" star, a Cepheid variable

    • B. 

      Travels the path of the Sun Along the celestial sphere

    • C. 

      Stays nearly in the same spot above the northern horizon year-round while the other stars circle around it

    • D. 

      ~434 light-years from Earth

  • 19. 
    Polaris won't always be the North Star, because....
    • A. 

      Some names will change throughout the centuries of astronomy

    • B. 

      Of the retrograde motion of the stars

    • C. 

      Precession of the Earth's axis will point away from its current position

    • D. 

      The gradual slowing of Earth's rotation

  • 20. 
    Precession is not caused by...
    • A. 

      Climate change

    • B. 

      The speed of rotation of Earth's axis

    • C. 

      Earth's bulge at its equator

    • D. 

      Gravitational attraction of the Moon and Sun

  • 21. 
    The summer Solstice occurs in the northern hemisphere when....
    • A. 

      The Sun intersects the Tropic of Cancer

    • B. 

      When the ecliptic intersects the celestial equator in March

    • C. 

      The Sun intersects the Tropic of Capricorn

    • D. 

      When the ecliptic intersects the celestial equator in September

  • 22. 
    When the ecliptic intersects the celestial equator it is called...
    • A. 

      Spring and Autumn equinox

    • B. 

      Winter Solstice

    • C. 

      Summer Solstice

    • D. 

      New years day

  • 23. 
    The summer solstice occurs in the southern hemisphere when....
    • A. 

      The Sun intersects the Tropic of Cancer

    • B. 

      When the ecliptic intersects the celestial equator in March

    • C. 

      The Sun intersects the Tropic of Capricorn

    • D. 

      When the ecliptic intersects the celestial equator in September

  • 24. 
    Which of the following is not true regarding the celestial sphere?
    • A. 

      Zero hours is the same as 24 hours in right ascension

    • B. 

      Zero hours right ascension is located at the autum equinox

    • C. 

      Zero hours right ascension is located at the vernal equinox

    • D. 

      Right acsension is measured in hours minutes and seconds

  • 25. 
    The solar days in the northern hemisphere summer are shorter than in the winter because of what primary reason?
    • A. 

      The slower rotation speed of Earth during winter will cause day and night time length to increase

    • B. 

      The orbit speed of Earth during summer will increase, because Earth is approaching the aphelion of its orbit, causing longer solar days

    • C. 

      The tidal bulge of the Earth combined with the liquid iron core slows down the rotation speed

    • D. 

      The orbit speed of Earth during summer will decrease, because Earth is approaching the aphelion of its orbit, causing shorter solar days

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