Wir leben auf einem Planeten, der einen der ca. 1011 Sterne unserer Galaxis umkreist. Auch diese unsere Galaxie ist nur eine von vielen. Man schätzt, dass mit heutiger Technik etwa 5 x 105 Galaxien allein von der Erde aus beobachtet werden können. Insgesamt soll es im sichtbaren Universum 7 x 1022 Sterne geben. Viele von diesen werden wahrscheinlich von einem oder mehreren Planeten umkreist [Quelle: Wikipedia].
Hinzu kommt eine weitere Dimension, die Zeit. Sterne "leben" nicht ewig, sie entstehen und vergehen auch wieder. Galaxien kollidieren und verschmelzen, Planeten bilden sich neu - das Universum ist nicht statisch.
Wie unwahrscheinlich ist es wirklich, dass irgendwann wenigstens auf einem dieser Abermilliarden Planeten Leben entsteht? Meiner Meinung nach ist es so wenig unwahrscheinlich, dass ich davon ausgehe, dass das Gleiche auch noch auf zig anderen Planteten passiert ist oder noch passieren wird.
MfG,
JLT
[Bild-Quelle: Hubble Space Telescope; Pinwheel Galaxy]
* "We succeeded in taking that picture [from deep space], and, if you look at it, you see a dot. That's here. That's home. That's us. On it, everyone you ever heard of, every human being who ever lived, lived out their lives. The aggregate of all our joys and sufferings, thousands of confident religions, ideologies and economic doctrines, every hunter and forager, every hero and coward, every creator and destroyer of civilizations, every king and peasant, every young couple in love, every hopeful child, every mother and father, every 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 in 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 the dot on scarcely distinguishable inhabitants of some other corner of the dot. 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. It is up to us. It's been said that astronomy is a humbling, and I might add, a character-building experience. To my mind, 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 and compassionately with one another and to preserve and cherish that pale blue dot, the only home we've ever known."
'Reflections on a Mote of Dust'. Carl Sagan [Bild-Quelle: Wikipedia]
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