The Juno probe of the US space agency on Tuesday began a mission twenty months around Jupiter to explore the interior previously unobservable of the largest planet of the Solar System and to better understand its origins.
3.6 tonnes of ship powered by solar energy, for the first time, be close the poles and the jovian equator, will through its nine instruments penetrate the thick cloud layer to the heart of the giant planet very inhospitable to unveil its secrets
-. what are the great mysteries of Jupiter
scientists believe Jupiter was the first planet in the solar system to form but do not know how
as the sun, it is largely composed of hydrogen (90%) and helium but also contains water and ammonia, elements left after formation of the sun.
– What does learn the mission of US $ 1.1 billion
the Juno Mission will seek to establish whether Jupiter is equipped with a solid core, will map its powerful gravitational and magnetic fields to determine its internal structure, will measure the amount of water and ammonia in the lower atmosphere and also observe the northern lights, says Nasa.
Juno will “make a big step in understanding how giant planets form and the role they play in the formation and organization of the rest of stellar systems “like ours, the space agency added.
the data collected will also shed new light on conditions in our early solar system, when the planet was in training
-.? How to determine the nature of the heart of Jupiter
“We do not know if Jupiter has or not a central core, “notes Tristan Guillot, head of research at the French National Centre for scientific research (CNRS), which participates in the Juno mission.
This is in particular measuring the amounts of water and ammonia in the Jovian atmosphere that “this issue and that the origins of this giant planet and the solar system will be elucidated,” said NASA
-. Juno will fly Where does Jupiter?
His first two revolutions will last about 54 days and then from October the ship will fit in an orbit of 14 days, brushing successively the two poles.
Being given that Jupiter rotates on itself in less than ten hours, Juno will go over different regions with each rotation, covering the entire planet when it has achieved the 34 orbits planned for the mission, before diving in Jupiter’s atmosphere where it will be destroyed.
“Never a ship will be approached as close to Jupiter: barely 10,000 kilometers above the poles and 5,000 km above the equator,” says Philippe Zarka, CNRS research director and scientists from the Juno mission.
“If the planet was the size of a basketball, the probe is approaching in less than a centimeter,” he said.
– what are the risks to get as close to the giant planet
the Jovian magnetic field is nearly 20,000 times more powerful than that of Earth and the planet is surrounded a belt of very high radiation equivalent to one hundred million radiology examinations a dentist for a year, according to NASA scientists.
to protect themselves, Juno is equipped with a solid shield titanium around its electronic equipment and instruments, a trip computer and electric wiring. Weighing 172 kilos, this vault will reduce radiation exposure 800 times compared to the unprotected part
05/07/2016 8:59:47 p.m. -. Washington (AFP) – AFP © 2016
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