The Earth's radius would be a mere 158 miles (254 km) if it was shrunk by 96%, remaining large enough to maintain its hydrostatic equilibrium.
If Jupiter's radius was shrunk by 96%, then it would be 1,738 miles (2,797 km), still being larger than Mercury.
No, it would not, because the smallest possible radius for a spherical celestial body is 200 km (124 miles) and Mercury would only have a radius of 61 miles (98 km) if it was shrunk 96%.
Mars's radius would be a measly 86.4 miles (139 km), meaning it would be unable to maintain its hydrostatic equilibrium.
Yes, Venus would be large enough to be spherical if the radius was shrunk by 96%. The point at which a planet achieves hydrostatic equilibrium is 124 miles (200 km), and Venus' radius would be 150 miles (241 km).
The radius of the moon would be 588.7 miles (947.4 km).
If the planet Venus had a moon 27% of its radius, then its moon would have a radius of 1,025 miles (1,650 km).
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Jupiter's volume is about 1,321 times greater than that of Earth due to its larger radius. Therefore, Jupiter could accommodate about 1,321 Earths within its volume.
That would have to be at a radius that is sqrt(26) = 5.1 times the Earth's physical radius, or about 32,486 kilometers (20,186 miles) from the center.
The radius of the moon would be 11,840 miles (19,055 km), seven times larger than any other moon in the Solar System.
The radius of this moon would be 9,862 miles (15,871 km), six times larger than any other moon in the Solar System.
If the sun expanded by 325 percent, it would be large enough to fit approximately 1.28 million Earths within its volume. This expansion would increase the Sun's radius significantly, making it much larger than its current size.