Why do stars twinkle?

1. 1

   Fuzz says

   Most stars shine with a steady light. That light travels a very long way to reach you. Right at the end, it passes through the air above your house, and that air is always moving and swirling. The moving air bends the starlight a tiny bit this way and that, so the star seems to twinkle.

   For ages 4–7
   Hear Fuzz

   Checked against Why do stars twinkle? (NASA StarChild)

2. 2

   Why do some stars twinkle more?

   Some stars sit low in the sky, just above the rooftops. Their light has to slant through much more air to reach you than light from stars up high. More air means more swirling, so those low stars twinkle the most.

   For ages 6–9
   Hear Fuzz

   Checked against Why do stars twinkle? (NASA StarChild)

In Lil' Phil, reaching the bottom of this wonder earns a sticker for Fuzz's collection.

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