The Mystery of the Disappearing Sun
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Questions and Answers

During a solar eclipse, what happens?

  • The Earth moves between the moon and the sun, blocking out the sun's rays
  • The moon moves between the sun and the Earth, blocking out the sun's rays (correct)
  • The moon disappears completely from the sky
  • The sun disappears completely from the sky

    • How long does it take for the moon to complete one revolution around the Earth?

  • 24 hours
  • 365 days and 6 hours
  • 27.322 days (correct)
  • 30 days

    • What is the elliptical path that Earth travels around the sun called?

  • Eclipse
  • Revolution
  • Orbit (correct)
  • Pathway

    • During a partial lunar eclipse, what can you see?

    <p>Earth's shadow covering a small part of the moon's surface</p> Signup and view all the answers

    What causes the moon to appear red during a total lunar eclipse?

    <p>Refraction from Earth's atmosphere</p> Signup and view all the answers

    What type of eclipse occurs when the moon passes through the center of the sun, but its disk isn’t big enough to cover the entire disk of the sun?

    <p>Annular solar eclipse</p> Signup and view all the answers

    What type of eclipse occurs when some parts of the Earth witness an annular solar eclipse, while other parts see a total solar eclipse?

    <p>Hybrid solar eclipse</p> Signup and view all the answers

    During an eclipse, an astronomical object is temporarily obscured by passing into the shadow of another body. What is this alignment of three celestial objects called?

    <p>Syzygy</p> Signup and view all the answers

    Which type of eclipse occurs when the Moon moves into the Earth's shadow?

    <p>Lunar eclipse</p> Signup and view all the answers

    Why don't eclipses happen every month?

    <p>The Moon's orbit is not in the same plane as the Earth's orbit</p> Signup and view all the answers

    What is the maximum number of eclipses that can occur in a calendar year between 1901 and 2100, excluding penumbral lunar eclipses?

    <p>Four solar and three lunar eclipses</p> Signup and view all the answers

    What determines the type of solar eclipse event observed from Earth?

    <p>The distance of the Moon from the Earth</p> Signup and view all the answers

    How long can a total solar eclipse last under the most favorable circumstances?

    <p>7 minutes, 31 seconds</p> Signup and view all the answers

    When can a lunar eclipse occur?

    <p>During a full moon</p> Signup and view all the answers

    During a solar eclipse, what happens?

    <p>The Moon passes between the Earth and the Sun, blocking the Sun's light</p> Signup and view all the answers

    What is the umbra?

    <p>The region of an object's shadow where the object completely covers the light source</p> Signup and view all the answers

    What is the antumbra?

    <p>The region of an object's shadow during an eclipse that extends beyond the tip of the umbra</p> Signup and view all the answers

    What is the penumbra?

    <p>The region of an object's shadow where the object is only partially in front of the light source</p> Signup and view all the answers

    During a lunar eclipse, the Moon moves into the Earth's shadow. What is this alignment of three celestial objects called?

    <p>Syzygy</p> Signup and view all the answers

    What type of eclipse occurs when the Moon's shadow crosses the Earth's surface?

    <p>Solar eclipse</p> Signup and view all the answers

    What determines the type of solar eclipse event observed from Earth?

    <p>Apparent sizes of the Sun and Moon</p> Signup and view all the answers

    During an eclipse, an astronomical object is temporarily obscured by passing into the shadow of another body. What is this alignment of three celestial objects called?

    <p>Occultation</p> Signup and view all the answers

    What is the maximum number of eclipses that can occur in a calendar year between 1901 and 2100, excluding penumbral lunar eclipses?

    <p>7</p> Signup and view all the answers

    What type of eclipse occurs when the Moon passes through the Earth's shadow?

    <p>Lunar eclipse</p> Signup and view all the answers

    What determines the type of solar eclipse event observed from Earth?

    <p>The distance between the Moon and the Sun</p> Signup and view all the answers

    During a lunar eclipse, which parts of the shadow are applicable?

    <p>Umbra and penumbra</p> Signup and view all the answers

    What is the length (L) of the umbral cone-shaped shadow during a lunar eclipse?

    <p>L = r ⋅ R_o / (R_s - R_o)</p> Signup and view all the answers

    What is the average length (L) of the umbral cone-shaped shadow of Earth during a lunar eclipse?

    <p>L = 1.384×10^6 km</p> Signup and view all the answers

    What is the approximate speed at which the shadow cast during an eclipse moves on Earth?

    <p>Approximately 1 km per sec</p> Signup and view all the answers

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