Little Blue Earth

Isn't this photo strikingly wonderous!   Planet Earth as photographed from Apollo 17.

From this perspective, the blue planet reminds many of a child's toy marble.  However, we know it to be quite more complex and valuable.  This image is shared publicly online in Wikimedia Commons

and is in the public domain because it was created by NASA.   The accompanying caption reads;

"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 kilometers (18,000 statute miles). It shows Africa, Antarctica, and the Arabian Peninsula.