1. Mercury and Venus are the only two planets in our solar system that do not have any moons.
2. We are aware of only 14 black holes in space.
3. The hottest planet in our solar system is Venus. Most people often think that it would be Mercury, as it's the closest planet to the sun. This is because Venus has a lot of gases in it's atmosphere, which causes the "Greenhouse Effect".
4. The solar system is around 4,500 million years old. Scientist estimate that it will probably last another 5000 million years
5. Enceladus, one of Saturn's smaller moons, reflects some 90% of the sunlight, making it more reflective than snow!
6. The highest mountain known to man is the Olympus Mons, which is located on Mars . It's peak is 15 miles (25KM) high, making it nearly 3 times higher than Mt Everest.
7. The Whirlpool Galaxy (M51) was the very first celestial object to be identified as being spiral.
8. A light year is the distance covered by light in a single year, this is equivalent to 6 million, million miles!
9. The width of the Milky Way is around 100,000 light years.
10. The Sun is over 300,000 times larger than Earth.
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