It's called The Green Planet because it's the only planet in the Solar System which has life:people,plants and animals.
Around the Earth the Moon spins and in about 28(twenty eight) days,realizing in the same interval/time a complete rotation.
Solar System's planets are:Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptun.
The 8 planets and the Sun accompained by comets and asteroids spin on proper orbits around the Sun.
Our galaxy is called Milky Way.It is a part from a group of about 30(thirty) galaxies with different sizes.