1. With a temperature of 475 degrees Celsius, Venus is actually the hottest planet in our solar system.
2. The sun makes up for more than 99 percent of the mass of the solar system.
3. There are more trees on Earth than stars in space.
4. If you're on Mars, the sunset you see will be blue.
5. There's an Earth-like planet called 55 Cancri e, which is made of diamonds.
6. Footprints of astronauts, or rover prints, will stay on the moon's surface for at least 100 million years.
7. Similar metals can weld together on their own, when in space.
8. There are more than 23,000 objects orbiting the earth that count as "space junk".
9. The International Space Station (ISS) is actually as big as a football field.
10. Uranus is the ONLY planet that rotates sideways.
11. Jupiter has a moon, Io, that is the most volcanically active moon in the whole solar system.
12. We've sent spacecrafts to every single planet, including a dwarf planet like Ceres!
13. Mercury is actually shrinking!
14. Winds on Neptune blow at 2,400 km/hour.
15. Space suits are expensive! A full NASA space suit can cost between $15-22 million.
16. The moon is round? No! It's lemon-shaped.
17. Space doesn't just have black holes. We also have white holes!
18. The sun loses about 5 million kilograms per second, only in energy.
19. Venus actually spins in the opposite direction to other planets.
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