Vida a l’univers
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Transcript of Vida a l’univers
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Vida a l’Univers
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Vida a l’Univers
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100.000 milions de galàxies
100.000 milions d’estrelles.
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Via Làctea
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Via Làctea
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Estem sols?
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Enrico Fermi
“Si hi han tantes estrelles, tantes galàxies...On son els extraterrestres?”
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•Potser hi ha poques civilitzacions.
•No han arribat com a mínim al nostre nivell tecnològic.
•No han buscat per aquí.
•Potser ens envien senyals però no som capaços de captar-les.
•Poder no volen interferir en el nostre desenvolupament.
•No els interessa viatjar.
r
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O potser simplement....
No existeixen.
r
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Recerca científica de la vida a l’Univers
r
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Recerca científica de la vida a l’Univers
r
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Recerca científica de la vida a l’Univers
Què necessitem?r
Fonts d’energia, dissolvents, carboni, esclat d’estrelles properes, etc.
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Recerca científica de la vida a l’Univers
Que tenim?r
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Recerca científica de la vida a l’Univers
Venusr
• Atmosfera de Diòxid de Carboni
• 90 bars de pressió = pressió a 1500 metres a l’aigua
•Efecte hivernacle descontrolat.
•450 o C (El plom es fon...)
•Plou àcid sulfúric concentrat.
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Recerca científica de la vida a l’Univers
Venusr
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Recerca científica de la vida a l’Univers
Martr
• - 100 o C
•Diòxid de Carboni
•Casquets polars
•Núvols, remolins, etc.
r
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Recerca científica de la vida a l’Univers
Martr
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Recerca científica de la vida a l’Univers
MartrLa llegenda de Mart
r
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Recerca científica de la vida a l’Univers
MartrLa llegenda de Mart
r
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Recerca científica de la vida a l’Univers
MartrLa llegenda de Mart
r
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Recerca científica de la vida a l’Univers
On busquem?r
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Recerca científica de la vida a l’Univers
Conclusionsr
Milers de milions de galàxies...
Milers de milions d’estrelles...
però les condicions per a la vida són difícils.
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Recerca científica de la vida a l’Univers
r
“¿Dios está dispuesto a prevenir la maldad pero no puede? Entonces no es omnipotente. ¿No está dispuesto a prevenir la maldad, aunque podría hacerlo? Entonces es perverso. ¿Está dispuesto a prevenirla y además puede hacerlo? Si es así, ¿por qué hay maldad en el mundo? ¿No será que no está dispuesto a prevenirla ni tampoco puede hacerlo? Entonces, ¿para qué lo llamamos Dios?”
Epicur de Samos
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Recerca científica de la vida a l’Univers
r
“Tembláis más vosotros al anunciar esta sentencia que yo al recibirla”
Giordano Bruno
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r
•Provoca avenços tecnològics
•Entendre l’univers.
•Entendre la biologia.
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Recerca científica de la vida a l’Univers
r
Ens ajuda a compendre’ns a nosaltres.
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Recerca científica de la vida a l’Univers
Pioneer 10 - 1972r
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Pioneer 10 - 1972r
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Recerca científica de la vida a l’Univers
Voyager - 1977r
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Recerca científica de la vida a l’Univers
Voyager - 1977r
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Recerca científica de la vida a l’Univers
Era una forma molt poc eficaç d’enviar un missatge.
La tecnologia de Radio és molt millor.r
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Recerca científica de la vida a l’Univers
L’era de la radiocomunicació.
Arecibo (16 Novembre 1974)
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Recerca científica de la vida a l’Univers
L’era de la radiocomunicació.
Senyal “Wow!” (15 Agost 1977)
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Recerca científica de la vida a l’Univers
L’era de la radiocomunicació.
“Little Green Men” (Juliol 1967)
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Recerca científica de la vida a l’Univers
L’era de la radiocomunicació.
“Little Green Men” (Juliol 1967)
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Recerca científica de la vida a l’Univers
ALH84001
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Recerca científica de la vida a l’Univers
Aminoàcids a l’espai.
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Recerca científica de la vida a l’Univers
Nous candidats - Europa
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Recerca científica de la vida a l’Univers
Nous candidats - Encelado
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Recerca científica de la vida a l’Univers
Nous candidats - Encelado
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Recerca científica de la vida a l’Univers
Nous candidats - Tità
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Recerca científica de la vida a l’Univers
Nous candidats – Més enllà...
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Recerca científica de la vida a l’Univers
Seti@Home
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Recerca científica de la vida a l’Univers
Seti@Home
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Recerca científica de la vida a l’Univers
MOLT CAR
Pocs descobriments.
Probabilitat d’èxit es difícil de calcular.
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Recerca científica de la vida a l’Univers
Però les probabilitats d’èxit de si no fem res són
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El fenomen OVNI
Dades
• 60 anys, 150.000.000 persones raptades 14 persones/min
• 99% confusions
• 1% restant?
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El fenomen OVNI
Kenneth Arnold (1947)
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El fenomen OVNI
Kenneth Arnold (1947)
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El fenomen OVNI
Cas “Roswell”
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El fenomen OVNI
Cas “Roswell”
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El fenomen OVNI
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El fenomen OVNI
Problemes:Distancia entre estrelles.
Velocitat de la llum
Cost energètic
Cost vital – supervivència
Aerodinàmica
Testimonis humans / Testimonis qualificats
“argumento ad ignorantiam”
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El fenomen OVNI
Tot i així...Aparença física humana
Missatges emocionals
“S’oculten” però els veu tothom...
Procedència: Venus, Mart,...
etc.
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El fenomen OVNI
Podrien moltes persones mentir o al·lucinar amb una història tan similar? O es molt arrogant qüestionar el sentit comú de les persones?
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Vida a l’Univers
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Vida a l’Univers
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Vida a l’Univers
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Vida a l’Univers
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Vida a l’Univers
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Vida a l’Univers
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Vida a l’Univers