letra de why is mercury shrinking? - kids learning tube
[chorus]
within the first planet, there’s a cooling emergency!
this planet’s shrinking much faster, yes i am mercury
[verse]
in 2004, nasa launched the messenger probe
it travelled 1,260 days to reach mercury from your globe
messenger took about 100,000 images by 2012
mapping 99% on my surface so you can see it well
these images were sent to scientists back to earth to inspect
to confirm what mariner 10 probe did suspect
they saw wrinkles and riffs on mercury’s surface
it’s like a raisin orbiting the sun, but why is this?
scientists confirm mercury is shrinking since its distant past
over 4,000,000,000 years, it’s 8 miles smaller in diameter, shrinking fast
the reason mercury is shrinking is because its cooling core
well look inside the planet to see if we can learn more
mercury has a large metallic core, 85% of its radius
which is very large for a planet, in which we’ll discuss
when the core does cool over this amount of time
a planet will shrink. you have learned this in this rhyme
when the planet’s core cools, the surface shrinks with it
causing riffs and valleys to occur, looking like a raisin, i admit
to shrink, heat must’ve escaped out of its cooling core
this heat must havd escaped through its mantle via heat pipes like a door
[chorus]
within the first planet, there’s a cooling emergency!
this planet’s shrinking much faster, yes i am mercury
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