courses:ast100:0
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| - | ====== | + | ====== 0. Seven Ages of the Universe ====== |
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| + | ===== - Background ===== | ||
| The history of the universe is divided into seven distinct ages based on the increasing complexity of matter and life. It begins with the Particle age, spanning the first 300,000 years, where fundamental particles and the first atoms formed. This was followed by the Galactic age, lasting from 300,000 years to 4 billion years, during which the first large-scale structures and galaxies assembled. The Stellar age ensued from 4 billion to 9 billion years, marked by the peak of star formation and the creation of heavier elements. Following this, the Planetary age occurred between 9 billion and 11 billion years, seeing the birth of solar systems and solid worlds. The timeline then transitions into the Chemical age (11 to 13 billion years), where complex organic molecules began to synthesize, paving the way for the Biological age (13 to 14 billion years), representing the rise of complex life on water and land. Finally, the Cultural age occupies the most recent 300,000 years, defined by the emergence of humanity, technology, and complex culture. | The history of the universe is divided into seven distinct ages based on the increasing complexity of matter and life. It begins with the Particle age, spanning the first 300,000 years, where fundamental particles and the first atoms formed. This was followed by the Galactic age, lasting from 300,000 years to 4 billion years, during which the first large-scale structures and galaxies assembled. The Stellar age ensued from 4 billion to 9 billion years, marked by the peak of star formation and the creation of heavier elements. Following this, the Planetary age occurred between 9 billion and 11 billion years, seeing the birth of solar systems and solid worlds. The timeline then transitions into the Chemical age (11 to 13 billion years), where complex organic molecules began to synthesize, paving the way for the Biological age (13 to 14 billion years), representing the rise of complex life on water and land. Finally, the Cultural age occupies the most recent 300,000 years, defined by the emergence of humanity, technology, and complex culture. | ||
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