When you're standing on Earth's surface, it's easy to forget that our planet is hurtling around the sun at more than 67,000 mph (107,800 km/h). And it's even easier to forget that there are seven other planets also making their way around our home star at similar breakneck speeds, or that all eight have been ceaselessly circling the solar system for billions of years.

But what might really blow your mind is finding out how many trips around the sun each planet has under its belt. This may seem like a tricky thing to calculate, but because the planets' orbits have remained largely unaltered for most of their existence, all it takes is a bit of basic math.

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[–] Treczoks 9 points 11 months ago

With an age of 4.5 billion years one could expect 4.5 billion trips around the sun - but this is only valid if earth always stayed in it's current orbit. It is a good estimate, though, as the only event that could have resulted in a noticable change of orbit was probably the creation of the moon, which also belongs in the 4.5 billion years ago category.