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Tag: universe

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Astronomy

How Big Is the Universe We Can Never See?

The observable universe stretches 92 billion light-years across. But beyond that enormous distance lies a mystery that science may never fully solve. Imagine traveling through space at the speed of light. You pass the Moon, the planets, and eventually the stars of our galaxy. You cross the vast distances between galaxies, traveling for billions of […]

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Astronomy

Has the Universe’s Expansion Started Slowing Down?

For nearly three decades, astronomers have been convinced that our universe is accelerating – expanding at an ever-faster rate due to a mysterious force known as dark energy. This startling cosmic acceleration, discovered in 1998 by observing distant stellar explosions called Type Ia supernovae, upended expectations and earned the 2011 Nobel Prize in Physics. But […]

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