Astronomers have used observations from HubbleтАЩs CANDELS survey to explore the sizes, shapes, and colors of distant galaxies over the last 80 percent of the universeтАЩs history. In the universe today, galaxies come in a variety of different forms and are classified via a system known as the Hubble Sequence тАФ and it turns out that this sequence was already in place as early as 11 billion years ago. // NASA/ESA