Carl Sagan unveils the Pale Blue Dot image

There are currently four spacecraft that are beyond the orbit of Neptune and Pluto. Pioneers 10 and 11, Voyagers 1 and 2. Four vehicles of our species plummeting into interstellar darkness. Now, of all those worlds, we have no signs of life. To me, that underscores the rarity and value of the Earth and life on it. And you can see it. It looks like more than a dot but is actually less than a pixel. You can see it's slightly

blue

and this is where we live. On a

blue

dot. On that blue dot, that's where everyone you know and everyone you've ever heard of lived their lives, and every human being who ever lived.

It is a very small stage on a large cosmic stage. Speaking for myself, I believe this perspective underscores our responsibility to preserve and cherish that blue dot, the only home we have.