Why is the sun so hot?
The sun is a giant ball of glowing gas!
Pip’s answer
- The sun is a giant ball of glowing gas!
- Deep inside, tiny bits squeeze together so hard they make light and heat.
- It is so big that more than a million Earths could fit inside, wow-ee!
For grown-ups
The sun is a star, a huge ball of hot gas, mostly hydrogen and helium. In its core, pressure and temperatures around 15 million °C force hydrogen nuclei together into helium in a process called nuclear fusion, which releases enormous energy as light and heat. About 1.3 million Earths could fit inside the sun.
Ask your child: Why do you think it's important never to look straight at the sun?
More questions kids ask
- 🌤️Why is the sky blue?
- ⭐Why do stars twinkle?
- 🌙Why does it get dark at night?
- 🌓Why does the moon change shape?
- 🌕Why doesn’t the moon fall down?
- 🚀How do rockets go to space?
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