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If Spock came with a super machine capable of moving planets, and placed Earth so close to Jupiter as the Earth's moon, the gravity of Jupiter would make us fall into it? Jupiter as close as the Moon

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To sum up Gerald's answer, we would be doomed. – Cheeku Apr 8 '14 at 1:15
up vote 8 down vote accepted

That's no good idea. Earth wouldn't necessarily fall into Jupiter in the short run, provided it orbits Jupiter fast enough (within about 1.7 days), and on a circular orbit, but we would risk to collide with Io, destroy it by tidal forces, or change its orbit heavily. The other Galilean moons would get out of sync and change their orbits over time.

Tides would be severe on Earth, not just limited to oceans, but also for "solid" ground, as long as Earth isn't tidally locked. This would result in severe earth quakes and volcanism.

Our days would be dim due to the distance to the sun. After tidal locking of Earth and ejection/destruction of Io the tides as heat source would be lost, oceans would freeze, temperature would fall to about -160°C mean temperature. During the polar night oxygen would probably condense from the atmosphere and form lakes, may be even nitrogen. By this atmospheric pressure would drop.

Since Spock is smart enough to know these consequences in advance, he wouldn't do it.

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+1 for that last line – tryingToGetProgrammingStraight Apr 18 '14 at 2:11
Some, but not all, of the bad effects could be alleviated by changing the conditions a bit: Move Jupiter into Earth's current orbit around the Sun, and put Earth into a circular orbit around Jupiter in tidally locked rotation. Once Earth's shape settles down from the new tidal forces, conditions shouldn't be too bad. Interactions with Jupiter's other moons might be a problem -- so move them. Interactions with Jupiter's magnetic field and radiation belts would still be, ahem, interesting. We should get some truly spectacular auroras, and we could see how Jupiter reacts to the extra heat. – Keith Thompson May 13 '15 at 0:06

The what if is superficial, it could never exist, but if one were to imagine, then; the out come would be very bleak for Earth and Mankind alike. Jupiter has the strongest gravitational pull in our solar system and most likely in our galaxy. It is one of our solar system's gas planets,or Jovian planets; it's core is made of H3, the gas succumbs to the ultimate power of Jupiter's gravity, mass,and temperature and turns from gas to liquid metal. These immense elements make it impossible for such an event to ever occur, but still cool to wonder about.
Jupiter and Io

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What do you mean by "H3"? – Keith Thompson May 13 '15 at 0:01
"Jupiter has the strongest gravitational pull ... most likely in our galaxy." Huh??? – ThePopMachine May 18 '15 at 18:42

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