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Sumario La tierra en el universo

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resumen de los inicios del universo hasta la formacion de la tierra como la conocemos

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Secondary school
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ESO
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4

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Uploaded on
June 18, 2025
Number of pages
4
Written in
2024/2025
Type
Summary

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LA TIERRA EN EL UNIVERSO
1. Origen y evolución del universo
- Todo lo que existe.

¿De que esta formado el universo?
o Galaxias: Estrellas, Objetos planetarios, planetas, asteroides, etc
o Galaxias= cúmulos= supercúmulos
o Tipos de galaxia:
 Irregular
 Espiral
 Elíptica

Origen del Universo
Big Bang (gran explosión) 13800 M.A.

Etapas:




Gran
explosion Nucleos
Energía Primeros Estrellas EXPANSIÓN
primeras H-He átomos Planetas
particulas




Evolución química
- Primeros nucleos= H y He
- Resto de elementos químicos= Nucleosintesis(fusión nuclear)
 Nucleosintesis primigenea= H, He
 Nucleosintesis estelar= H, He y resto de elementos químicos( en etapas
posteriores

Etapas de la evolución de una estrella
1. Protoestrellas (de una nebulosa)
2. Secuencia Principal: fusión nuclear (H-He)
3. Postsecuencia principal: otros elementos químicos : gigante roja – Enana blanca
Supergigante roja – Supernova: estrellas de neutrones o agujero negro
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