Season 1 Episodes8
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Jim Al-Khalili
Narrator
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Ranked #1 of 8 in Season 1•+0.1 vs season avg
Join a team of scientists as they launch a probe to actually touch the Sun. Then they make a surprise discovery on the tiny planet Mercury. An exhilarating real-life space adventure, revealing that our nearest star could pose a serious threat to our modern way

Jim Al-Khalili
Narrator
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"Sun & Mercury" is episode 2 of Secrets of the Solar System season 1. It scored 8.6/10 from 18 votes, ranking #1 of 8 episodes this season (season average 8.5). It aired on February 14, 2020.