Galileo and Jupiter's Moons-
In 1610, when Galileo first pointed his newly built telescope toward the sky, no one had ever had the capability to see distant objects in any detail, and he had no idea what to expect. Focusing on the Moon first, he discovered that its surface was not smooth as people had previously thought, but covered with craters and mountains not unlike those on Earth. Next, Galileo turned his attention to another bright object in the night sky — the planet Jupiter. Today, we know quite a bit about Jupiter ...
