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I don't know about that. If you mark 2 points on a balloon with a marker and begin blowing it up, these two points would most certainly move away from each other. They would not, however, move away from each other near as fast as the expansion speed of the balloon itself. If two planets bearing the seeds of life were side-by-side billions of years ago, they would likely be far out of sight now after billions of years, but not by light years.
One light year is roughly 5,879,000,000,000 miles.
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