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STARS AND CONSTELLATIONS REVIEW

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  • What are the two factors that affect the brightness of a star?
    Size and Distance from Earth
  • These are sections of the sky with recognizable patterns of stars
    Constellations
  • Give at least three constellations that can be seen in the Northern Hemisphere?
    Ursa Major, Ursa Minor, Cassiopeia, and Cygnus
  • He devised a scale of 1 to6 to describe the apparent magnitude of a star
    Hipparchus
  • What causes star trails?
    The Earth's Rotation. Stars in the Northern hemisphere appear to rotate around Polaris.
  • What is the function of a Stellar Spectra?
    It contains the information about the star's temperature, chemical composition, and intrinsic luminosity
  • What is the top 1 brightest star as seen from Earth?
    SUN
  • What is absolute magnitude?
    Brightness measured at 10 parsecs from the Earth
  • Noted for the five-star asterism that forms the letter W
    Cassiopeia
  • Why do stars twinkle?
    The twinkling of the stars is an illusion created by the moving air in the atmosphere that bends the light moving in a straight line
  • What factors affect the luminosity of a star?
    Size and Surface temperature
  • What are circumpolar constellations?
    Constellations that can be seen all year round
  • The British Astronomer who discovered that stars move and change positions
    Edmund Halley
  • It forms the keel of a boat known as Argo Navis
    Carina
  • Why do hottest stars appear bluish to white?
    Because they emit their energy in the blue to UV wavelengths
  • How does the color of a star relate to its temperature?
    Cooler stars appear reddish while hotter stars appear bluish
  • What is a Planisphere?
    A rotating star locator that can be adjusted to display visible stars for any time and date
  • What are the five major characteristics of Stars?
    Color, Temperature, Size, Brightness, and Composition
  • It is considered as the brightest star in the night sky with an absolute magnitude of 1.4
    Sirius
  • The two star pointer that helps in locating the Polaris
    Dubhe and Merak
  • It describes the rate at which a star radiates energy
    LUMINOSITY
  • It is the brightness measured at actual distance from the Earth
    Apparent Magnitude
  • Give at least three constellations that can be seen in the Southern Hemisphere?
    Southern Cross, Carina, and Centaurus
  • What is the temperature range and color of a type O star?
    Bluish in color, 30,000 to 80,000 k temperature
  • The constellation that contains the Sirius star
    Canis Major
  • These are stars with more than 10 times the size of the sun
    Super Giants
  • What are the three major classifications of stars according to size?
    Dwarf, Giant, and Super giant
  • It contains the asterism known as Northern Cross
    Cygnus
  • The constellation the contains the seven-star dipper asterism and is also considered as the third largest constellation
    Ursa Major
  • The constellation that contains the Polaris
    Ursa Minor
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