If Earth Were a Gas Giant's Moon

Here is what we know of Earth:

• Mass: 5.972 sextillion metric tons
• Diameter: 7,917.5 miles
• Density: 5.51 grams per cubic centimeter
• Rotation: 24 hours
• Revolution: 365 days
• Core: 760 miles wide, 1,355 miles thick, 84% iron, 6% nickel
• Mantle: 3,958 miles deep, 45% silicon, 41% magnesium, 8% iron, 3% aluminum, 2% calcium
• Crust: 3-30 miles thick, 58% silicon, 16% aluminum, 8% iron, 7% calcium, 4% magnesium, 3% sodium, 2% potassium
• Water: 71%
• Median surface temperature: 58.62 degrees Fahrenheit
• Current axial tilt: 23.5 degrees

In an alternate universe, Earth is all of that...

...except that the bright light in this photo isn't the moon, but a gas giant the size of Jupiter (86,881 miles wide, 1.33 grams per cubic centimeter and 1,898,000,000,000 trillion metric tons in mass). Which means that this alternate Earth isn't a planet, but a moon. It orbits the gas giant so far away that its size on the sky is the same as our moon is back home. Is this far enough for Moon-Earth to retain the features listed above, or would it instead have to contend to tidal locking and intense radiation?

posted over 5 years ago

JohnWDailey‭

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