Over the past four hundred years, there have been monumental discoveries in the field of astronomy. Astronomers have used the light from stars to better understand the universe around them. Technological advancements allowed astronomers of the twentieth century to look beyond just the visual universe. Using different equipment, astronomers can see objects in the universe that were once hidden to the human eye. Astronomers have built a habitat in space that is permanently occupied. Currently, there are three rovers traveling around Mars' surface sending back data to astronomers on Earth.
It seems that each decade has brought about another major discovery in the field of astronomy. It may make one wonder, what will be discovered next? Thanks to the hard work of astronomers before you, you have a better picture of what the universe looks like; however, even today there are so many unanswered questions. Someday, it may be you that becomes the astronomer to find the answers to these questions of the unknown.