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Open University
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These resources have been reviewed and selected by STEM Learning’s team of education specialists for factual accuracy and relevance to teaching STEM subjects in UK schools.
A Day on Mercury
This animated clip explains how Mercury rotates in around 59 Earth days to rotate but only takes 88 Earth days to orbit the Sun (the length of its year). So Mercury spins three times for every two orbits, which means each Mercury day lasts for two Mercury years. This means, living on Mercury, you would celebrate two birthdays every day.
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