Planet Jupiter Facts
Jupiter planet facts reveal that it is the largest planet in our solar system, a massive gas giant composed mainly of hydrogen and helium with no solid surface. It is famous for its powerful storms, including the long lasting Great Red Spot, and its extremely strong magnetic field. Jupiter also has at least 95 known moons, with the four largest, Io, Europa, Ganymede, and Callisto, offering some of the most fascinating worlds in space. Spinning once every 10 hours, Jupiter has the fastest rotation of all planets, creating extreme weather patterns and intense atmospheric bands that make it one of the most dynamic planets to study.
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Jupiter Location in the Milky Way Galaxy
Local Fluff of Local Bubble
Galactic Orion Arm Spur
26,000 LY from Galactic Center
Jupiter is 40 Light Minutes Away from Earth
Gas Giant Planet Class
Jupiter
Super Jovian Size
317.83 Earth Mass
Io
262,000 Miles
Tidally Locked
0.015 (EM)
Mercurian
2,263 Miles
3.53 Density
0.183 g
Toxic Atmosphere
Frozen
No Life
-234 F Average Temp (Frozen)
Toxic Atmosphere
88,846 Diameter
1.33 Density
2.40 g
Europa
417,000 Miles
Tidally Locked
0.08 (EM)
Mercurian
1,939 Miles
3.01 Density
0.134 g
No Atmosphere
Frozen
Life ?
Ganymede
665,000 Miles
Tidally Locked
0.0248 (EM)
Mercurian
3,273 Miles
1.94 Density
0.146 g
No Atmosphere
Frozen
No Life
Callisto
1,170,000 Miles
Tidally Locked
0.018 (EM)
Mercurian
2,995 Miles
1.83 Density
0.126 g
No Atmosphere
Frozen
No Life
Note: Only the largest Moons of Jupiter are displayed. Jupiter has 95 Moons.
Jupiter Tilt Relative to the Plane of Solar System
Jupiter Axial Tilt
3.13°
Jupiter Spins Nearly Upright
Jupiter Seasons
None
Jupiter Has No Seasons
Jupiter Atmosphere Composition and Pressure
Hydrogen
89.7%
Helium
10%
Methane
0.3%
0.1 to 0.5 Bar Atmospheric Pressure in Upper Clouds
10 Bar Atmospheric Pressure in Lower Troposphere
3 Million Bar Atmospheric Pressure in Deep Interior
45 Million Bar Atmospheric Pressure at Diffused Core
Jupiter's Atmospheric Pressure is Not a Single Value Since it Has No Solid Surface
Jupiter Weather
Clouds
Ammonia Hydrosulfide
Ammonium Hydrosulfide Crystals
Water Ice
Wind
200 to 900
Miles per Hour
Rain
Ammonia/Neon/Water
Slushy Rain and Snow
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Deep Atmosphere
Helium Rain and Diamonds
Lightning
100 X More Powerful than Earth Lightning
Jupiter Surface and Internal Composition
Crust
No Crust
Gaseous Clouds of
Hydrogen & Helium
Mantle
No Mantle
Ocean of
Supercritical Fluid Hydrogen
Outer Core
Vast Ocean of
Liquid Metallic Hydrogen
Inner Core
Dense Rock, Metal, and Superionic Water, Ammonia, and Methane Ice Mixture
Large Dilute "Fuzzy"
Spread Out Core
Surface Liquid
None
Surface Ice
None
Sub-Surface Liquid
Hydrogen
Sub-Surface Ice
Water, Ammonia, and Methane
Jupiter Magnetic Radiation Shield
4.3 to 14 Gauss Magnetic Field Strength
Caused by a Massive Rapidly Spinning Interior Layer of Liquid Metallic Hydrogen within Jupiter
Jupiter Similarity to Earth
10%
Jupiter is Not Similar to Earth
Jupiter Alien Life Chance
0.001%
Cloud Microbial Life Very Unlikely
Chemical Rocket Travel Time
5 Earth Years
Fission Rocket Travel Time
10 Earth Months
Fusion Rocket Travel Time
5 Earth Months
Laser Light Sail Travel Time
2.5 Earth Months
Top 5 Most Asked Questions About the Planet Jupiter (Answered Simply)
What is Jupiter made of?
Jupiter is a gas giant composed primarily of hydrogen and helium, similar to the Sun but without enough mass to trigger nuclear fusion. These two light gases make up the vast majority of the planet’s atmosphere, along with smaller amounts of methane, ammonia, water vapor, and other compounds that contribute to its bands of clouds and storms.
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Deeper inside Jupiter, scientists believe pressure and temperature rise so extremely that hydrogen may exist in a liquid metallic state, which helps generate the planet’s powerful magnetic field. At its core, there may be a dense mixture of rock, metal, and ice, though the exact structure is still uncertain because Jupiter has no solid surface we can observe directly.
How big is Jupiter compared to Earth?
Jupiter is enormous compared to Earth, so large that about 1,300 Earths could fit inside it. In terms of diameter, Jupiter is roughly 11 times wider than Earth, measuring about 86,881 miles or 139,820 km across at its equator.
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Despite its massive size, Jupiter is a gas giant, meaning it doesn’t have a solid surface like Earth. Its low density also means it is much less “solid” than it looks, but it still has more than 300 times the mass of Earth, making it by far the largest planet in our solar system.
Does Jupiter have any moons and how many?
Jupiter has a large and constantly growing system of moons. As of current confirmed observations, Jupiter has 95 known moons, though that number can change as new small moons are discovered.
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The four largest moons, Io, Europa, Ganymede, and Callisto, are known as the Galilean moons and are visible even with small telescopes. Ganymede is especially notable because it is the largest moon in the entire solar system, even bigger than the planet Mercury. The smaller moons vary widely in size and orbit, with many being captured asteroids or irregular fragments.
What is the Great Red Spot on Jupiter?
The Great Red Spot is a massive, long lasting storm on Jupiter. It is essentially a giant anticyclonic or high-pressure storm, similar in concept to a hurricane, but far larger and far more powerful than anything on Earth.
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This storm has been observed for at least 300 to 400 years and is big enough to fit multiple Earths inside it. It appears as a reddish oval in Jupiter’s atmosphere, and while it has been slowly shrinking in recent decades, it remains one of the most iconic and studied features in the solar system.
Could life exist on Jupiter?
Jupiter is considered very unlikely to support life as we know it. The planet is a gas giant made mostly of hydrogen and helium, with no solid surface, extremely high pressure, and intense radiation from its powerful magnetic field, conditions that are hostile to Earth-like biology.
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However, some scientists have speculated that certain layers in Jupiter’s upper atmosphere, where temperatures and pressures are milder, could potentially allow for simple microbial life forms to exist. This idea is still purely theoretical, and there is currently no evidence that any life exists on Jupiter.
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