Photo credit: Representative Cover Image Source: American astronaut Joseph Tanner waves to the camera during a space walk as part of the STS-115 mission to the International Space Station, September 2006. (Photo by NASA/Getty Images). – Array
Photo credit: Representative Cover Image Source: The frigid water of Niagara Falls empties into the frozen Niagara River on the Canadian side of Niagara Falls, Ontario, Canada. (Photo By Raymond Boyd/Getty Images) – Array
Photo credit: Representative Cover Image Source: NASA astronauts Fred Haise and Jim Lovell during a training session at Kennedy Space Center on Merritt Island, Florida, 3rd February 1970. (Photo by Space Frontiers/Archive Photos/Hulton Archive/Getty Images) – Array
Photo credit: Representative Cover Image Source: Image recorded by the Hubble telescope in 2001 shows a type of object unknown in our own Milky Way Galaxy. (Photo by NASA/Getty Images) – Array
