from its familiar stripes to its giant
red spot Jupiter has mesmerized
scientists for centuries
it's the largest planet in our solar
system and its icy moons could Harbor
key ingredients for life an
understanding them could help us answer
some of the biggest questions about our
solar system like how exactly did life
form that's exactly what the European
Space Agency's Juice mission hopes to
find out the satellites of Jupiter are
very interesting because there is
probably more liquid water inside some
of the satellite than on earth so it
became a fascinating question whether
around a planet like Jupiter we might
have places which are maybe interesting
for life Jupiter icy moons Explorer or
juice is ESA's mission to study if the
icy moons around Jupiter are as
habitable as scientists think the single
orbital spacecraft will orbit Europa and
Callisto but will make history as it
orbits Ganymede for the first time ever
we are going to study the entire of the
moon the subsurface surface the little
atmosphere around the moon the plasma
environment so it's quite interesting
because we are not going to address only
one question but several questions
thanks to measurements collected by
NASA's Galileo probe we now have a
better idea of what may lie beneath the
icy crust of these moons
the presence of salty water and Europa
is believed to have the most with an
ocean containing more liquid than all of
Earth's oceans combined then we come to
the apple of juices eye Ganymede it's
the primary focus for this mission since
it's Jupiter's largest moon and has its
own magnetic field last but not least is
Callisto because of its ancient and
heavily cratered surface Callisto was
long believed to be geologically
inactive but that might not be true this
moon may also hold an underwater ocean
those three moons they're in different
state of evolution one is very active
one is there is an internal magnetic
field and one looks dead so it's very
interesting to compare the three moons
and to understand better the condition
of habitability around Jupiter it's not
every day that we send a spacecraft to
Jupiter so juice will be equipped with
10 instruments all working together to
try and capture as much
as possible form will be remote sensing
instruments capable of capturing
ultraviolet to the submillimetre
wavelengths to better study Jupiter's
clouds atmosphere and its satellites icy
surfaces the next batch are the
geophysical instruments that will study
the surface and subsurface of the moons
as well as explore the atmosphere and
measured the gravitational field finally
we have the in situ instruments composed
of sensors to study the particle
environment electric and magnetic fields
I like order experiment in fact they
have been selected to the complimentary
to each other if I take the example of
exploring the subsurface ocean we don't
see the ocean so it's always an indirect
measurement so it's better to have
measurement from different instrument to
make sure we know exactly what we are
talking about but figuring out how to
power the instruments and the spacecraft
was a challenge since Jupiter is roughly
seven hundred and seventy seven million
kilometres away from the Sun this makes
it much harder to use solar power so to
capture as much sunlight as possible
juice will use massive solar arrays
about 85 square meters in size despite
being the largest solar panels ever
placed on a spacecraft they'll provide
less than 1,000 watts of power which is
less power than a home vacuum cleaner in
total the instruments in solar arrays
will account for less than half the
spacecraft's 5 metric tons size while
the rest is chemical propellant to help
steer the spacecraft for its orbital
insertions so what can we expect when it
actually launches right now juice is
slated to liftoff in 2022 aboard an
Ariane 5 rocket but the launch will only
be the first step we are going to make
three orbits around the Sun to get more
and more velocity with different gravity
as these flybys so three F flybys of the
earth one flyby of Venus and one flyby
of Mars
seven and a half years after its initial
launch juice will finally arrive at
Jupiter and then after of Jonah our
fears that would be the most exciting
part of the mission I'm sure we'll all
be around Ganymede so first time we do
that after collecting tons of images and
details of the largest moon it
this point that juice will make a
planned crash on the Ganymede surface
hopefully leaving us with a better
understanding of our solar system's
largest planet and its mysterious moons
and we are juiced for the results when
we talk about this mission to people and
they always get excited because it
touched possible life outside earth and
the Jupiter moon I mean it they were
discovered by Galileo in 1610 and that
was the way people thought differently
about the solar system so this mission
is very exciting from any point of view
and I think it's the right moment to do
this this mission for more countdown to
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