I've posted about this in the past, but this type of photograph is my favorite.  Juno, the recently launched probe to Jupiter, recently captured a single frame in which the Earth and the Moon were both visible.

I love this because it gives you a radically different perpective on the moon when you look up at in the sky.  It seems so close, but in this photo you can see how far away it really is.

I love this because it clearly demonstrates the vastness of emptyness that surrounds us.

I love this because it describes vividly how far humans themselves have been able to explore, from the dot on the left to the dot on the right at its full extreme.

Take a minute to look and ponder.

From: http://www.onorbit.com/node/3747

 

@NASAhistory just posted to twitter that this pictures was taken 33 years ago today: I love pictures like this, the Earth and the Moon in one frame.  This image was taken by Voyager 1, the first to look back from such a distance (7,250,000 miles away), and the right equipment, that the Earth and Moon could be seen together as a pair. There's more information about the photo here. A more recent photo was taken by the MESSENGER spacecraft en route to orbit Mercury: This photo was taken from about the same distance from the Earth as the orbit of Mercury and was just recently released. Many people have remarked about its resemblance to the Pale Blue Dot photograph (also from Voyager 1).

Look again at that dot. That's here. That's home. That's us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives. --Carl Sagan (from his book Pale Blue Dot: A Vision of the Human Future in Space)