the old grind
Elite Member
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- Jul 21, 2012
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As for satellites falling to Earth when coming out of orbit vs the moon going away we have to acknowledge the many magnitudes greater the Moon is from our planet. Satellites orbit dozens of miles from us while the Moon is many thousands away. Our gravity and friction of whatever aura or aurora around us has a much stronger effect on orbit velocity vs the vacuum of space.
Gravity pulls man-made objects down as their velocity is reduced but the moon is orbiting much slower. It is also spiraling away from us vs in a stationary orbit so its slowing down is mitigated the pull of our gravity but not enough yet to overcome it. Both Earth and the moon are pulling toward each other. The slowing of the lunar velocity proportionally too low to compensate for the escape.
Heck of it is that the Sun may run out of fuel before the Moon escapes orbit. That rate/amount/time cannot be measured or accurately predicted. I've heard years ago that it could be in as few as 5 million years or as many as 50 million. We would not survive a transition from yellow dwarf to red giant when that happens. Compared to ~4 1/2 billion years since our Solar system was formed the Sun is very far along in life as they say.
Of note regarding our planet's span of time, the ascent of man, and civilization: Cleopatra lived closer in time to the moon landing than to the construction of the pyramids, the first being built while the woolly mammoth was still alive. There is more time between the last of Stegosaurus and the demise of T-Rex than between the T-Rex and us. The Stegosaurus was last seen 150 million years ago, while the first Tyrannosaurus Rex appeared 67 million years ago. We're not forever, and Elvis is still dead.
Gravity pulls man-made objects down as their velocity is reduced but the moon is orbiting much slower. It is also spiraling away from us vs in a stationary orbit so its slowing down is mitigated the pull of our gravity but not enough yet to overcome it. Both Earth and the moon are pulling toward each other. The slowing of the lunar velocity proportionally too low to compensate for the escape.
Heck of it is that the Sun may run out of fuel before the Moon escapes orbit. That rate/amount/time cannot be measured or accurately predicted. I've heard years ago that it could be in as few as 5 million years or as many as 50 million. We would not survive a transition from yellow dwarf to red giant when that happens. Compared to ~4 1/2 billion years since our Solar system was formed the Sun is very far along in life as they say.
Of note regarding our planet's span of time, the ascent of man, and civilization: Cleopatra lived closer in time to the moon landing than to the construction of the pyramids, the first being built while the woolly mammoth was still alive. There is more time between the last of Stegosaurus and the demise of T-Rex than between the T-Rex and us. The Stegosaurus was last seen 150 million years ago, while the first Tyrannosaurus Rex appeared 67 million years ago. We're not forever, and Elvis is still dead.