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What Causes a Lunar Eclipse to Happen?

Why the Moon Changes Color

Imagine the moon is like a big, white ball. Earth blocks the sunlight from reaching it during an eclipse, the light still passes through Earth's atmosphere, but it changes color to red or orange. That’s why the moon looks like it’s wearing a red cape!

How It Works

Earth’s atmosphere acts like a giant filter. Blue light gets scattered away, and red light travels straight through to hit the moon, making it look red from our view on Earth.

Test your understanding →

Examples

  1. Imagine the moon like a big, white ball, when Earth blocks the sunlight from reaching it, the moon turns red like it’s wearing a cape.
  2. It's like looking at a sunset from the moon’s perspective, only now, the whole moon is glowing red.
  3. A lunar eclipse is nature’s way of painting the moon with red colors during an alignment.

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Categories: Space · Lunar Eclipse· Earth Shadow· Moon Phases · Text is available under the Creative Commons Attribution-ShareAlike License.