3 Read and listen to the text. What is the sun? Our solar system has eight planets. Earth is the third planet. At the centre of our solar system is the sun. All the planets go around the sun. We say they orbit the sun. Each time a planet makes one orbit of the sun, it completes a year. The sun is not a planet. It is a stor. Many of the planets have a moon. Moons orbit their planets. Earth has one moon but some planets have more than 50! va rog traduceți în romana​