Space Systems Vocabulary

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Model

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A simplified representation used to explain complex systems or processes, such as the Sun’s life span and energy production through nuclear fusion, based on observational evidence.

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Lifespan of the Sun

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The entire duration of the Sun’s existence, from its formation about 4.6 billion years ago to its eventual transition into a red giant and then a white dwarf.

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Nuclear Fusion

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The process in the Sun’s core where hydrogen nuclei combine to form helium, releasing vast amounts of energy that powers the Sun and radiates outward.

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Sun’s Core

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The central region of the Sun where temperatures and pressures are high enough to sustain nuclear fusion, producing the energy that fuels the Sun’s light and heat.

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Energy Transfer Mechanisms

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Processes that move energy from the Sun’s core to its surface and beyond, including radiation, convection, and conduction, eventually delivering energy to Earth as sunlight.

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Radiation

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The emission of energy as electromagnetic waves, including visible light, which travels from the Sun’s surface through space to reach Earth, providing the energy needed for life.

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Masses of Stars

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The amount of matter in stars, which influences their life cycles and energy outputs, serving as comparative evidence for understanding the Sun’s life span.

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Lifetime of Stars

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The stages stars go through from birth to death, which vary based on mass and composition, offering insights into the life cycle of the Sun.

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Solar Flares

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Sudden, intense bursts of radiation from the Sun’s surface, caused by magnetic activity, which can impact space weather and communications on Earth.

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Space Weather

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The environmental conditions in space influenced by the Sun’s activity, including solar flares and radiation, which can affect satellites, power grids, and astronaut safety.