IS PLUTO IS THE PLANET? THE UNIVERSE
IS PLUTO IS THE PLANET? THE UNIVERSE HISTORY OF PLANETS DISCOVERY Throughout the ages, the number of planets in our solar system has gone up and down. No, this is not because planets have suddenly appeared and disappeared, but rather due to how they world discovered. Science antiquity, they were 5 planets beyond Earth, which are the ones visible to naked eye, mercury Venus Mars Jupiter and Saturn. The ancient Greek at did the sun and moon to their list of planets, but that idea never really caught on. In the late 1700s, Uranus was discovered, which was revolutionary at the time as no one considered there could be more planet bye on the visible five. After the discovery more and more planets candidates being found, like Ceres, vesta, palas and Juno, which are all found in what we know as the asteroid belt for the large asteroids between the orbit of Mars and Jupiter. In science textbooks in the early 1800s, devar all listed as planets. In the middle of 1800s, netz...