How High You Could Jump on Different Planets

 別の惑星に行ったら、何mまでジャンプできるか

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gravity is what keeps your feet firmly
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planted on the ground
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that's why the average person can only
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jump about one and a half feet straight
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up
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but if we had to live on another planet
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say
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venus or saturn let's find out what
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difficulties we'd have to endure there
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we'll try mercury first as it's closest
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to the sun
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the gravity on this planet is less than
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half that on earth
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so you'll be able to jump about four
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feet high
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that is if you can stand the
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temperatures on the sunny side
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the heat reaches 800 degrees to be there
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is like standing neck deep in dark red
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lava on the slopes of a volcano
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oh boy knight won't bring much respite
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either
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scorching air will quickly chill to
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minus 280
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degrees you'll also have to be patient
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since one day on mercury
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lasts 176 earth days well
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hopping from this inhospitable place to
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even less welcoming
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venus you'd be able to see earth from
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here if not for the whirling mass of
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clouds above
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they create a monstrous greenhouse
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effect as well as immense atmospheric
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pressure
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if you were to jump here you'd make it
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just shy of 1.7 feet high
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because the mass and size of earth and
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venus are almost similar with venus
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being a little smaller
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besides the constant temperature of a
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blazing furnace
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rain here wouldn't bring relief the
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clouds up there are made of sulfuric
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acid skipping our home planet we go
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straight for its moon
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luna as it's otherwise called gravity
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here is less than a fifth of that on
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earth
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so if you jump you'll rise almost nine
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feet in the air
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and won't touch the ground again for
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several seconds it's hard to believe
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this desolate piece of space rock makes
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tides on earth habit
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and if you stay on the moon long enough
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as in a couple million years
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you'll see how much further it's gone
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from our home planet
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next destination is mars the red planet
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here a vertical jump will take you about
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four feet in the air
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if there was any air to speak of of
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course mars has an atmosphere
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but it's much thinner than on earth if
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you stay here until evening
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you'll be able to marvel at a beautiful
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blue sunset
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and you can probably see a mountain from
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here that's olympus mons
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the tallest mountain in the solar system
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it's almost three times taller than
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everest
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and it's also a volcano by the way
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leaping from here to phobos one of the
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two moons of mars
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plant your feet firmly and don't be
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attempted to jump
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gravity here is so weak that you won't
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be able to return
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phobos is really small compared to other
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modes in the solar system
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no larger than a big asteroid it's
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almost a hundred times closer to its
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planet than
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our moon to earth eventually it's doomed
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to be pulled
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critically close to mars and shatter
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scientists believe mars can obtain its
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own rings then much like saturn
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now we're going to a really weird object
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it's called
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ceres and it's the largest asteroid in
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the solar system
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so large in fact it was later classified
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as a dwarf planet
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it's almost exactly halfway between mars
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and jupiter
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somewhere in the main asteroid belt if
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you jump here
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you'll be taken up almost 52 feet and
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then
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slowly fall back ceres is so massive
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that it accounts for a third of all mass
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in the asteroid belt
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fast forward to the next waypoint
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jupiter
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being a gas giant this planet has no
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solid surface
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so jumping here is irrelevant but if you
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must
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you could only hop about 6 inches high
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jupiter is more than 10 times larger
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than earth
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and 300 times as massive so its gravity
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is enormous there's also a perpetual
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storm on its surface that's been there
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for at least
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four centuries although it's getting
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smaller with time
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at the moment our whole planet could fit
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into that storm
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our next stop is ganymede the largest of
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jupiter's moons
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it's solid so you can easily jump here
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and make it over 10 feet high
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this moon is larger than mercury but its
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mass is significantly lower
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which makes gravity rather weak ganymede
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is covered in thick ice
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and deep beneath that is a liquid metal
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core
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this core is why ganymede is the only
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moon to have a pretty strong magnetic
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field
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next we go to saturn the second gas
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giant of the solar system
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it's only slightly smaller than jupiter
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able to fit
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nine and a half moons in it but way less
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massive
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if it had any hard surface to jump from
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you'd be able to hop as high as 1.4 feet
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in the air
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almost as high as on our planet saturn
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is most famous for its rings
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which are particles of dust and ice left
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from impacts with different space
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objects it spins so fast around its axis
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that it has flattened itself
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almost into an oblong shape it also has
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62 moons only 5 fewer than jupiter
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let's explore one of them right now
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hopping further and here we are
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on the largest moon of saturn titan
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jumping here will take you just shy of
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11 feet high
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the atmosphere of this moon is most
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peculiar it's heavy
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and mostly consists of nitrogen making
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the surface appear hazy
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it's also made almost entirely of ice
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but there's rock underneath
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and water is only thought to be deep
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below near the core
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and one amazing thing on titan's outside
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are cryovolcanoes
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volcanoes that spew ice instead of lava
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next on our path is uranus another giant
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only this one is made of
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ice in fact it's mostly similar to
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jupiter and saturn
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but it has much more ice in its
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atmosphere and mantle
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jumping here will take you up about 1.7
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feet
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uranus is also the lowest minimum
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temperature of all planets in the system
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at minus 377 degrees it's colder than
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liquid nitrogen
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so you'll freeze right where you stand
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cool
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really our route continues with neptune
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the twin brother of uranus
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it's also an ice giant and although a
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bit smaller in size
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it's much more massive because of this
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mass the gravity here is also impressive
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you'd only be able to jump about 1.3
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feet
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one year on neptune takes almost 165
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earth years
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because it's 30 times further from the
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sun than we are
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in fact this is the last proved planet
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of the solar system
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but our hopping trip isn't finished yet
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we're arriving to triton one of
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neptune's moons
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gravity here is not extremely low so a
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single jump would take you a comfortable
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19 feet up triton is the only moon that
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moves in a retrograde orbit
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that is against the movement of neptune
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around its axis
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it also has a unique surface feature
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called cantaloupe terrain
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for its similarity to a melon next is
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the dark and lonely pluto
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formerly the ninth planet but now no
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more than a dwarf planet
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its gravity is somewhat lower than that
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of triton's and you could jump over 25
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feet high here
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pluto is too small to be a fully fledged
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planet
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it's smaller than many moons including
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ours its atmosphere appears and
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disappears at times
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when pluto is closer to the sun the ice
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on its surface evaporates to become the
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atmosphere
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but as soon as it travels further the
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gas layer goes away
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so hold your breath and finally our
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final stop finally it's eris
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it's a dwarf planet that travels in and
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out of the kuiper belt
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a second asteroid belt that's 20 times
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as wide as the one between mars and
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jupiter
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jumping on eris's surface would take you
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up about 18 feet
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this object was actually the reason why
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the term dwarf planet appeared in the
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first place
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astronomers wanted to call it the tenth
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planet of the solar system
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but then reconsidered and if they hadn't
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who knows
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maybe we would have had even more
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planets afterwards
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oops this just in the universe really
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doesn't care what we deem planets or
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moons
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it's too busy with important stuff