Gravity is a force that atract us or whatever object or living creature to the Earth. Newton discoverd this force in the moment that an apple fell on his head. This force is the same as the one who make the planets stay in their orbit in relantion with the Sun without changing their rout.

The Solar Sistem is where we live, is where the Earth and other planets are; like: Mercury, Venus, Mars, Jupiter, Saturn, Uranus and Neptune. Pluto is not a planet anymore for being small (Sorry Pluto). Jupiter is the biggest planet of the Solar Sistem. Jupiter, Saturn, Uranus and Neptune have rings. Payable by the distance of the planet in relation to the Sun the temperature varies that is called the habitable zone.