Very well, there is just one Photo voltaic Program within our galaxy, as only ours is formally named so. But astronomers have found over three,200 other stars with planets orbiting them during the Milky Way.依據希臘神話，銀河是赫拉在發現宙斯以欺騙的手法誘使他去餵食年幼的赫拉克勒斯因而濺灑在天空中的奶�