Given the distance — 1.44 billion kilometres or nearly 10 times the distance from Earth to the Sun — Earth will be just 1.5 pixels wide and the illuminated section will be even smaller.
On Friday, July 19 between 21:27 and 21:47 UTC NASA’s Cassini spacecraft took images of Saturn, with the planet Earth in the background nearly 1.5 billion kilometers away. NASA encouraged the public to look and wave in the direction of Saturn at the time of the portrait and share their pictures via the Internet.
AMSAT-UK International Space Colloquium attendees were among the many world-wide who did just that.