How Astronomers Use Light Years To Measure Distances In Space
It was hotter and denser than anything we can imagine. Astronomical distances are sometimes expressed in light-years especially in popular science publications and media.
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Most astronomers believe the Universe began in a Big Bang about 14 billion years ago.
How astronomers use light years to measure distances in space. Then it suddenly exploded. A light-year is the distance light travels in one Julian year around 9461 billion kilometres 5879 billion miles or 03066 parsecs. The Universe that we know was born.
At that time the entire Universe was inside a bubble that was thousands of times smaller than a pinhead. In round figures a light year is nearly 10 trillion kilometres or nearly 6 trillion miles.
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