A Blood Moon happens during a total lunar eclipse.
It looks red because Earth's shadow covers the Moon.
The red color comes from sunlight bending through Earth's atmosphere.
This is the same reason why sunsets look red.
A Blood Moon can only happen during a full moon.
It does not stay red forever it slowly changes back to normal.
Some people in history thought a Blood Moon was a bad sign.
A Blood Moon can be seen from anywhere on Earth where the eclipse is visible.
9. It does not harm people or the Earth in any way.
10. The next Blood Moon will happen in 2025.