• Comets are constantly losing matter. They are losing and losing and never gaining. "Short Period Comets" (like Haley's comet), which have predictable orbits, should deteriorate to nothing within 10,000 years. Why are there still Short Period Comets?

 

  • Jupiter is losing heat twice as fast as it gains it from the Sun (it is five times further from the Sun than Earth). Yet Jupiter is still hot. If it is billions of years old, shouldn't it have cooled off by now?

 

  • Jupiter's moon, Ganymede, which is roughly the size of Mercury, has a strong magnetic field, a possible indication that it is still hot. Why hasn't it cooled down?

 

  • Saturn's rings are not stable. They are drifting away from Saturn. If Saturn is billions of years old, why does it still have rings?

 

  • The Moon is slowly drifting away from the Earth. If it is getting further, at one time it was much closer. The Inverse Square Law dictates that if the Moon were half the distance from the Earth, its gravitational pull on our tides would be quadrupled. 1/3 the distance, 9 times the pull. Everything would drown twice a day. Approximately 1.2 billion years ago, the Moon would have been touching the Earth. Drowning would be the least of our concerns!

 

Earth's rotation is slowing down. We experience a leap second every year and a half. If the Earth is slowing down, at one time it was going much faster.
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