2.Should it have no nucleus, the Earth would be subjected to deadly space rays and life would be impossible.
3.Any spaceship penetrating our atmosphere at angle bigger than 5.8 degrees, would most probably burn.
4.Worldwide, less than 50 people actively look for asteroids.
5.Asteroid oddly means in Greek “similar to a star”.
6.Astronomers don’t use the term “light year”.
7.We have more detailed maps of the Moon and Mars compared to the bottom of the oceans.
8.The astronomer William Henry Pickering thought that black spots on the Moon were migrating insects.
9.Frontiers of the Solar System are not anywhere near the most distant planets. Going to the dwarf planet Pluto covers roughly 1/1,000th of the distance.
10.There is liquid water on Mars.