It’s hard to truly grasp the incredible vastness of space.
It’s equally hard to grasp how tiny humanity is.
In 1990, at the request of Carl Sagan, NASA turned the cameras from Voyager 1 back towards earth. Earth, being around 6 billion kilometers away, is only a fraction of a pixel. Titled the Pale Blue Dot, this is the furthest photo from earth, of earth, ever taken.
Sagan, who wrote a book by the same name, talks about the photo he helped create. Wikipedia gives a smaller section of this quote, but I prefer the whole thing:
From this distant vantage point, the Earth might not seem of any particular interest. But for us, it’s different. 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. The aggregate of our joy and suffering, thousands of confident religions, ideologies and economic doctrines, every hunter and forager, every hero and coward, every creator and destroyer of civilization, every king and peasant, every young couple in love, every mother and father, hopeful child, inventor and explorer, every teacher of morals, every corrupt politician, every “superstar,” every “supreme leader,” every saint and sinner in the history of our species lived there – on a mote of dust suspended in a sunbeam.
The Earth is a very small stage in a vast cosmic arena. Think of the rivers of blood spilled by all those generals and emperors so that, in glory and triumph, they could become the momentary masters of a fraction of a dot. Think of the endless cruelties visited by the inhabitants of one corner of this pixel on the scarcely distinguishable inhabitants of some other corner, how frequent their misunderstandings, how eager they are to kill one another, how fervent their hatreds.
Our posturings, our imagined self-importance, the delusion that we have some privileged position in the Universe, are challenged by this point of pale light. Our planet is a lonely speck in the great enveloping cosmic dark. In our obscurity, in all this vastness, there is no hint that help will come from elsewhere to save us from ourselves.
The Earth is the only world known so far to harbor life. There is nowhere else, at least in the near future, to which our species could migrate. Visit, yes. Settle, not yet. Like it or not, for the moment the Earth is where we make our stand.
It has been said that astronomy is a humbling and character-building experience. There is perhaps no better demonstration of the folly of human conceits than this distant image of our tiny world. To me, it underscores our responsibility to deal more kindly with one another, and to preserve and cherish the pale blue dot, the only home we’ve ever known.
I love Sagan’s ability to strip away the trivial and superficial, and step back to see the big picture — the biggest picture.
Humanity has but one opportunity to do things right.
Like it or not, for the moment the Earth is where we make our stand.
I’m fearfull we will blow it; I’m excited by our potential. It gives me the chills. Anyone else feel the same?
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Carl Sagan. Pale Blue Dot: A Vision of the Human Future in Space. 1994.
http://en.wikipedia.org/wiki/Pale_Blue_Dot
