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A nanosecond is one billionth of a second . . . a long time compared to the femtosecond, the attosecond, and the shortest possible unit of time known as Planck time.
Source: A Brief History of Time by Stephen Hawking, Image: pixabay.com
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The oldest known object in the universe is a galaxy called z8_GND_5296. It’s 13.1 billion years old—only about six hundred million years younger than the universe.
Source: space.com, Image: Wikipedia
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As for the oldest known object on Earth? It is a 4.4-billion-year-old piece of zircon that was found in Jack Hills in Western Australia. It’s only 160 million years younger than the Earth.
Source: nationalgeographic.com, Image: commons.wikimedia.org
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Our sun is about five billion years old. The Earth is estimated to be 4,540,000,000 years old.
Source: A Brief History of Time by Stephen Hawking, Image: Wikipedia
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According to modern science, time is the fourth dimension. The first three dimensions are used to specify an object’s location or movement in space, while the fourth dimension locates its position in time. All four dimensions are used to specify completely the location or dynamism of an object in space.
Source: astronomytrek.com, Image: Wikipedia
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