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Age of the Earth, Solar System and Universe

Delve into the fascinating evolution of our cosmos, from the ancient solar system to the vast universe. Learn about radioactive decay, radiometric dating, and evidence supporting the Earth's age. Discover how we measure the solar system and universe, explore the concept of half-life, and grasp the immense scale of the cosmos. Unravel the mysteries of the speed of light and the history of the universe in just 10 minutes!

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Age of the Earth, Solar System and Universe

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  1. Age of the Earth, Solar System and Universe • Solar System: 4.6 billion years old • Earth: 4.5 billion years old • Universe: 13.8 billion years

  2. Radioactive Decay • The decay of radioactive elements into other elements • Mass gets released as energy

  3. Radiometric Dating • Uses the rate of decay of certain elements to date rock and other objects

  4. Half-Life • The time it takes for an element to decay by half

  5. Evidence for the age of the Earth • Dating rocks • Dating meteorites • Dating lunar rocks

  6. Measuring the Solar System • Astronomical Unit (AU) • The distance from the Earth to the Sun • 149,600,000 km (92,957,130 miles)

  7. Measuring the Universe • Parsec: 8 trillion miles • Used to measure the distance to stars • 206,265 AU

  8. Speed of Light • Speed of light • 186,282 miles/second • 670,615,200 mph • Light Year: the distance light can travel in one year • 5.9 trillion miles • Proxima Centauri : 4.2 ly

  9. History of the Universe in 10 minutes • https://www.youtube.com/watch?v=wXLfbfsidp4

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