Space Shuttle Endeavour Over Earth

Space Shuttle Endeavour over Earth, c2010. Though astronauts and cosmonauts often encounter striking scenes of Earth's limb, this very unique image, part of a series over Earth's colorful horizon, has the added feature of a silhouette of the space shuttle Endeavour. The orange layer is the troposphere, where all of the weather and clouds which we typically watch and experience are generated and contained. This orange layer gives way to the whitish Stratosphere and then into the Mesosphere. In some frames the black color is part of a window frame rather than the blackness of space. Artist NASA. (Photo by Heritage Space/Heritage Images via Getty Images)