A different space camera received a lot more photons from Earth and the Moon that same day: MESSENGER. During a search for small (hence, faint) satellites, the Earth-Moon pair passed through MESSENGER's wide-angle camera field of view. They're blobs in the image below, although in fact neither is actually wider than one pixel -- they are just so bright that they expanded into brilliant blobbiness. I haven't seen someone do the calculation for how likely photons reflected from any one person were to reach Mercury. According to the caption published with the MESSENGER Earth-Moon photo, Pluto is actually also in this image, but far too faint for MESSENGER to see it.
The pair of bright star-like features in the upper panel are not stars at all, but the Earth and Moon! MESSENGER took the photo on July 19, 2013, from a distance of 98 million kilometers. Earth and Moon are both overexposed; the image was part of a long-exposure search for satellites around Mercury.
Here is a lovely comparison photo assembled by the Planetary Habitability Laboratory using image data from Earth's weather satellites acquired at about the same time, from about the same angle, as the MESSENGER photo -- only from much, much closer. The GOES image was grayscale; it has been colorized with data from NASA's Visible Earth project using the Planetary Habitability Laboratory's Scientific Exoplanets Renderer software.
PHL @ UPR Arecibo, NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington, NERC Satellite Station, Dundee University, Scotland
Earth at the moment of the "Day the Earth Smiled" photo
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