T he terrestrial planets – Mercury, Venus, Earth and Mars – are separated into similar layers: a hot dense core, a warm pliable mantle and a cooled rocky crust. Mercury is around 70 per cent metallic and 30 per cent rocky. Its core is thought to comprise as much as 85 per cent of the planet, a
WHAT ARE PLANETS LIKE ON THE INSIDE?
Oct 06, 2022
2 minutes
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