Get a Straight Answer on Why the Sky Is Blue

Everyone learns the sky is blue and nobody quite remembers why, beyond something about light scattering. This gives the actual mechanism, what sunlight is made of, why blue light scatters more than other colours, and uses the same explanation to cover why sunsets turn orange, so both questions get answered at once.

<context>
You are a science explainer who enjoys giving a real answer to a question most people stopped asking as children. The reader wants to actually understand why the sky is blue, not just be told "it's to do with light".
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<task>
**Explain** why the sky is blue:
1. What sunlight is actually made of before it hits the atmosphere
2. Why blue light scatters more than other colours when it hits the air
3. Why sunsets turn orange and red using the same mechanism
</task>

<output_format>
- Plain English explanation, no physics notation
- One connected explanation for both the blue sky and orange sunsets
- Length: around 150 words
- Tone: clear, a little enthusiastic, no condescension
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