First Star formed
13.72 Billion years ago · Prehistoric
Approximately 13.72 billion years ago, the first star formed in the observable universe. Gravitational collapse of a gaseous nebula composed primarily of hydrogen and helium created this primordial star. Thermonuclear fusion of hydrogen into helium in the star's core generated energy that enabled it to shine. This event initiated stellar evolution, a process of stellar birth, life, and death. The first star and subsequent stars became building blocks for galaxies, star clusters, and other large-scale structures in the observable universe.
Locations
Universe
Topics
cosmologysciencespace
Connected Events — 13 Connections
Buddha's death crystallized Buddhist doctrine and practices that would later be selectively adopted and reinterpreted by Ashoka, who emphasized Buddhism's moral and social teachings while de-emphasizing ritualistic aspects in his edicts Edicts of Ashoka
Saladin's recapture of Jerusalem shifted the Crusader states into a defensive posture, forcing them to consolidate around coastal strongholds like Acre, which became their primary base and last major foothold that would eventually fall in 1291 Fall of Acre
Created the major cult center of Amun at Thebes that Tutankhamun actively restored and patronized as part of his reversal of Akhenaten's Atenist reforms, returning power to the Amun priesthood Death of King Tut
Stars aggregated under gravitational attraction to form the first galactic structures Formation of First Galaxies: Birth of Stellar Structures
Thermonuclear fusion in the first stars produced elements heavier than helium, initiating stellar nucleosynthesis First Heavy Elements: Birth of Stellar Nucleosynthesis
Alexander's accession to the Macedonian throne provided him the military resources and legitimacy necessary to challenge Darius III directly, transforming Philip II's planned Persian campaign into Alexander's world conquest Alexander the Great becomes King
The Big Bang produced the primordial hydrogen gas that gravitationally collapsed to form the first stars hundreds of millions of years later The Big Bang: The Cosmological Event
Hulagu Khan's conquest of Baghdad destroyed the House of Wisdom's vast collection of Islamic scholarship, then immediately established Maragha Observatory in 1259 as a replacement intellectual center, relocating surviving scholars and manuscripts to continue astronomical and mathematical work under Mongol patronage Siege of Baghdad
The completed Great Wall sections served as tangible proof of Qin Shi Huang's divine mandate and imperial power, legitimizing his sacred Mount Tai ceremony by demonstrating his ability to defend and unify Chinese civilization against barbarian threats Great Wall of China Started
The first stars initiated reionization by emitting ultraviolet radiation into the surrounding neutral hydrogen End of Cosmic Dark Ages: Universe Becomes Transparent
Big Bang nucleosynthesis produced the hydrogen and helium gas that gravitationally collapsed to form the first stars Big Bang Nucleosynthesis
The first generation of stars produced the heavy elements and radiation that enabled dense cluster formation just a few hundred million years later Cosmic Gems Arc: Proto-Globular Star Clusters Form at Extreme Density
The first stars formed roughly 90 million years after the habitable window closed, meaning the heavy elements necessary for rocky substrates and complex chemistry did not yet exist during the epoch Cosmic Background Temperature Enters the Liquid Water Range
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