Assertion: light year | /r/HasProperty | 4.2×10 ^ 9 pc
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Source sentences:
text: The distance the light from the edge of the observable universe has travelled is very close to the age of the universe times the speed of light, 13.8 billion light-years (4.2×10 ^ 9 pc), but this does not represent the distance at any given time because the edge of the observable universe and the Earth have since moved further apart.