Science+questions+page+10

Angela Corrao Science page 10 questions 1-3 1. The ancient civilization’s which gave rise to our modern calendar was the early Roman calendar. The early Roman calendar had exactly 365 days in a year, and seven days in a week. It was then determined that there are about 365.25 days in a year. 2. The advantage that Galileo Galilei had over the other astronomers was that he was the first person who used a telescope. While having the advantage of using the telescope he discovered four moons orbiting Jupiter, craters, and mountains on the moon, sunspots on the sun, and phases of Venus. It showed that the planets are more then just lights they are physical bodies like the earth. 3. Copernicus’s theory is not completely correct though it is pretty close. His theory states that the sun in at the center of the universe and the planets; including the Earth orbits the sun. All the planets do orbit the sun, but we have been proven the believe that the sun is not completely centered between all the planets, including Earth.