Από τη μέρα, στη νύχτα.

Πρότεινα χτες να βάλεις για desktop την έγχρωμη φωτογραφία από το συνέδριο Σολβέ, αλλά σήμερα έχω να προτείνω κάτι πιο φωτογενές. Ένα τεράστιο κολάζ με τη Γη όπως φαίνεται από δορυφόρο. Ιστορικά, η NASA έχει δημοσιεύσει διάφορες τέτοιες φωτογραφίες, με τις πιο πρόσφατες το καλοκαίρι να φτάνουν κάτι εξωφρενικές αναλύσεις, 8000×8000 και 12000×12000! Μπορείς να ζουμάρεις και να δεις την Ελλάδα πεντακάθαρα, πχ. Αλλά ενώ εκείνες οι φωτογραφίες δείχνουν σε όλο τον πλανήτη μέρα, αυτές που δημοσιεύει σήμερα δείχνουν νύχτα.  Εμένα με κέρδισαν το κλιπάκι που δείχνει τη σφαίρα μας να γυρίζει (30sec και 55MB, αξίζει), και αυτή (κλικ για να τη δεις τεράστια):

Τι ωραίο πράγμα οι φωτογραφίες της Γης από το διάστημα! Το γιατί, το συνοψίζει καταπληκτικά ο Καρλ Σέιγκαν σε τρία λεπτά.

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, ever king and peasant, every young couple in love, every moth 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 momentary masters of a fraction of a dot. Think of the endless visited by the inhabitants of one corner of this pixel 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.

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