Small Orbiting Bodies Review 2023-2024

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What is the K-T Event?

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The K-T Event, also known as the Cretaceous-Paleogene (K-Pg) extinction event, was a mass extinction event that occurred approximately 66 million years ago, leading to the extinction of about 75% of all species, including the dinosaurs.

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What is the Kuiper Belt?

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The Kuiper Belt is a region of the solar system beyond the orbit of Neptune, populated with small icy bodies, including dwarf planets like Pluto and many comets.

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How many comets and asteroids are estimated to be in the solar system?

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There are estimated to be trillions of comets and asteroids scattered throughout the solar system.

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What happens to a comet when it approaches the Sun?

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When a comet approaches the Sun, it heats up, causing its ices to vaporize and form a glowing coma and a tail that always points away from the Sun.

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What is the difference between a comet and an asteroid?

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Comets are icy bodies that release gas or dust, forming a tail when near the Sun, while asteroids are rocky or metallic objects that do not have tails.

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What is the significance of asteroids that are at least 1 km in diameter?

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Asteroids that are at least 1 km in diameter can cause significant damage if they collide with Earth, hitting approximately every few hundred million years.

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What is the Oort Cloud?

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The Oort Cloud is a theoretical cloud of icy bodies believed to exist in the outermost reaches of the solar system, serving as a source for long-period comets.

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What is a comet's tail made of?

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A comet's tail is made of gas and dust that is released from the comet's nucleus as it approaches the Sun.

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What role do small orbiting bodies play in the solar system?

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Small orbiting bodies, such as asteroids and comets, provide insights into the early solar system's formation and evolution and can impact planetary bodies.

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What is the difference between short-period and long-period comets?

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Short-period comets have orbits that take less than 200 years to complete, typically originating from the Kuiper Belt, while long-period comets have orbits that take more than 200 years, originating from the Oort Cloud.