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Moon in Earth’s Shadow

When the Moon is full, the Sun, Earth, and Moon line up with Earth in the middle. The Moon moves into Earth’s shadow and glows red.

In the picture

  1. The Sun: the bright source of light
  2. Earth: the planet casting the shadow
  3. Earth’s shadow: the dark cone that the Moon enters
  4. The Moon: the body glowing coppery red inside the shadow
  5. The orange-red ring around Earth: sunlight bent through Earth’s air

Examples

  • A red sunset, where sunlight bends through the air
  • A flashlight blocked by a ball, making a dark shadow

Quiz: Moon in Earth’s Shadow (Age 12)

  1. When can a lunar eclipse happen?

    • When the Moon is new
    • When the Moon is half-lit
    • When the Moon is full
  2. Why does the Moon glow red during a lunar eclipse?

    • Earth’s clouds reflect red light onto the Moon
    • Sunlight is bent and filtered through Earth’s air
    • The Moon produces its own red light
  3. What does the Moon move into during a lunar eclipse?

    • The Sun’s shadow
    • Earth’s shadow
    • The Moon’s own shadow

The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.

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Astronomy, Age 12