1. The last time Halley’s Comet was seen in the inner solar system was in 1986.
2. The sun is more than 300,000 times larger than the earth.go
3. It is believed that dinosaurs became extinct more than 65 million years ago after, an asteroid impacted the earth.
4. The hottest planet in our Solar System is Venus with a surface temperature of more than 450 degrees Celsius.
5. The fastest meteoroids travel through the Solar System reaching speeds of more than 42 kilometers per second.
6. It was in 2006 that astronomers decided to change the definition of a planet. As a result Pluto is now considered a dwarf planet.
7.. Saturn is not the only planet with rings. Uranus, Jupiter, and Neptune also have rings, though theirs are not as visible.
8. More than 4.6 billion years ago, the solar system was formed.
9. Because Mars has a lower gravity, if a person weight 100 kilograms on earth, they would weight only 38 kilograms on Mars.
10. The moon has more craters than earth because there is far less natural activity going on. Earth’s surface is continuously being reformed by erosion, earthquakes, rain, winds, hurricanes, plant growth, etc., while the moon has little weather that affects it’s appearance.
11. The gravity of the sun and the moon is what causes high and low tides.
12. Uranus is the only planet that rotates on it’s side like a barrel and Venus is the only planet that spins backwards.
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