Jupiter

Jupiter

·        Introduction

Jupiter is that the largest planet within the system. Fittingly, it had been named once the king of the gods in Roman mythology. In a similar manner, the traditional Greeks named the world once Zeus, the king of the Greek pantheon.

Jupiter helped revolutionize the way we saw the universe and ourselves in 1610, when Galileo discovered Jupiter's four large moons — Io, Europa, Ganymede and Callisto, now known as the Galilean moons. This was the primary time that celestial bodies were seen circling associate degree object apart from Earth, major support of the Copernican read that Earth wasn't the middle of the universe.

·        Composition & structure

Atmospheric composition (by volume): eighty-nine.8 % molecular gas, 10.2 percent helium, minor amounts of methane, ammonia, hydrogen deuteride, ethane, water, ammonia ice aerosols, water ice aerosols, ammonia hydrosulfide aerosols

Magnetic field: Nearly 20,000 times stronger than Earth's

Chemical composition: Jupiter features a dense core of unsure composition, enclosed by a helium-rich layer of fluid metallic gas, wrapped up in an atmosphere primarily made of molecular hydrogen.

Internal structure: A core less than 10 times Earth's mass surrounded by a layer of fluid metallic hydrogen extending out to 80 to 90 percent of the diameter of the planet, enclosed in an environment largely made from gaseous and liquid gas.

·        Orbit & rotation

Average distance from the sun: 483,682,810 miles (778,412,020 km). By comparison: 5.203 times that of Earth

Perihelion (closest approach to the sun): 460,276,100 miles (740,742,600 km). By comparison: 5.036 times that of Earth

Aphelion (farthest distance from the sun): 507,089,500 miles (816,081,400 km). By comparison: 5.366 times that of Earth

·        Jupiter's moons

Jupiter has a minimum of sixty-three moons, that area unit typically named once the Roman god's several lovers. The four largest moons of Jupiter, currently referred to as Io, Europa, Ganymede, and Calisto, were discovered by Galileo Galilei himself, and are appropriately known today as the Galilean satellites.

Ganymede is that the largest moon in our scheme, larger even than Mercury and Pluto. It is conjointly the sole moon known to possess its own flux. The moon has a minimum of one thick ocean between layers of ice, although it may contain several layers of both materials. This moon are the most target of the ecu Jupiter Icy Moons person (JUICE) which will launch in 2022 and make Jupiter's system in 2030.

·        Research & exploration

Seven missions have flown by Jupiter — Pioneer ten, Pioneer 11, Voyager 1, Voyager 2, Ulysses, Cassini and New Horizons. Two missions – NASA's Galileo and Juno missions – have truly orbited the world. Two mission’s area unit planned to check Jupiter's moons: NASA's Europa Clipper (which would launch within the 2020s) and therefore the European house Agency's Jupiter Icy Moons person (JUICE) that may launch in 2022 and arrive at Jupiter's system in 2030 to study Ganymede, Callista and Europa.

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Pioneer ten disclosed however dangerous Jupiter's radiation belt is, while Pioneer 11 provided data on the Great Red Spot and close-up pictures of its polar region. Voyager one and a couple of helped astronomers produce the primary elaborate maps of the Galilean satellites, discovered Jupiter's rings, revealed sulfur volcanoes on Io, and saw lightning in Jupiter's clouds. Ulysses discovered the solar radiation features a abundant larger impact on Jupiter's flux than before urged. New Horizons took close-up photos of Jupiter and its largest moons.

·        Possibility of life on Jupiter

If one were to dive into Jupiter's atmosphere, one would discover it to grow hotter with depth, reaching temperature, or 70 degrees F (21 degrees C), at an altitude where the gas pressure is regarding ten times as nice because it is on Earth. Scientists have conjectured that if Jupiter has any kind of life, it'd dwell at this level, and would need to be mobile. However, researchers have found no evidence for life on Jupiter.