I see no such caption associated with any images on that page.This photograph:
is captioned :'Cloud formations in a famous image of Earth from Apollo 17 makes atmospheric circulation directly visible'
I see this:
"The Blue Marble" is a famous photograph of the Earth taken on December 7, 1972, by the crew of the Apollo 17 spacecraft en route to the Moon at a distance of about 29,000 kilometres (18,000 mi). It shows Africa, Antarctica, and the Arabian Peninsula.