1. The position affects the temperature of the planet because of how far away it is from it from the sun
2. Mercury and Venus are very close to the sun so they are very hot and can't support any life.Earth is the most perfect place to support life because it has water and a proper atmosphere. Mars is very rocky and is a unique red colour. Jupiter is a gas planet and has a red dot. Saturn has rings made of ice and dust just like Uranus and Neptune is so cold and is definitely too cold for humans to live.
3.Asteroides and coments are a mass of rock and dust and ice and coments have a tail of light and may be also know as shooting stars