From 4 million miles away on December 16, 1992, NASA's robot spacecraft Galileo took this picture of the Earth-moon system. Our moon is one of the largest moons in the solar system. It is even larger than the planet Pluto. In this picture, the Earth-moon system actually appears to be a double planet.
The bright, sunlit half of the Earth contrasts strongly with the darker subdued colors of the moon. The <a href="https://en.wikipedia.org/wiki/terminator_(solar)" class="extiw" title="en:terminator (solar)">terminator</a> (<i>day-night-line</i>) is much less sharp on earth because of atmospheric <a href="https://en.wikipedia.org/wiki/refraction" class="extiw" title="en:refraction">refraction</a> (<i><a href="https://en.wikipedia.org/wiki/twilight" class="extiw" title="en:twilight">twilight</a></i>).
NASA
1992-12-16
This image or video was catalogued by Jet Propulsion Laboratory of the United States <a href="https://en.wikipedia.org/wiki/NASA" class="extiw" title="w:NASA">National Aeronautics and Space Administration</a> (NASA) under <b>Photo ID:</b> <a rel="nofollow" class="external text" href="https://images.nasa.gov/search?q=PIA00134&amp;page=1&amp;media=image,video,audio&amp;yearStart=1920&amp;yearEnd=2023">PIA00134</a>.