Unit 4 Astronomy: the science of the starsHow much do you know about the universe?How much do you know about the universe?What are the names of the eight planets that circle our sun? What is their order from the sun?地球 _木星 _火星 _水星 _海王星 _土星 _天王星 _金星 _EarthJupiterMarsMercuryNeptuneSaturnUranusVenusTHE SOLAR SYSTEMTHE SOLAR SYSTEM 1. How old is the universe?2. How old is the earth?3. Which were the first creature or plants on earth?4. Do you know what the order for the development of plants and ani