Today, Wednesday the 22nd of April, marks the 45th year of Earth Day. A day dedicated for support of environmental protection. In celebration of Earth Day, let's take a look at our planet through the eyes of an astronaut and photographer.

Donald Pettit is an American chemical engineer and NASA astronaut. With seven missions to space and two long stays aboard the International Space Station, Donald gives us and inspirational insight into the vast possibilities of seeing things differently.