More impressively, the ratio of the electromagnetic force to gravity must be accurate to 1 part in 1040. Were this ratio a bit higher, the gravitational attraction would be too strong in comparison to the contravening force of electromagnetism pushing nuclei apart. In that case, stars would, again, burn too quickly and unevenly to allow for the formation of long-lived stars and stable solar systems. Were this ratio a bit lower, gravitational attraction would be too weak in comparison to electromagnetism. That would have prevented stars from burning hot enough to produce the heavier elements
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