1. In the distant future, the Sun's gases will burn away.
2. It's possible to predict what will happen to the
inner planets.
3. In our solar system, eight planets orbit around the Sun.
4. When the Sun's core heats up, the sun will expand.
5. The Earth won't be able to support living things when the Sun dies.
6. As the Sun shrinks, it will become cold and dark.
7. The Earth rotates every 24 hours.