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Post by inconceivable on Jun 15, 2008 20:45:24 GMT -4
If gravity decreases while approaching the center of the Earth, how far down would this cavern have to be to simulate the moon's gravity?
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Post by LunarOrbit on Jun 15, 2008 20:50:10 GMT -4
What cavern?
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Post by dwight on Jun 15, 2008 20:59:03 GMT -4
The one with Morlocks in it?
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Post by JayUtah on Jun 15, 2008 21:01:57 GMT -4
Apparently the cavern that was allegedly dug into the Earth to the point where net centrally-tending gravity was only 1/6 that of the surface. There the studio was built to film the lunar surface shots.
My questions to inconceivable are: what was the limit of mining tunneling in 1969 and whether any tunnels have ever been dug in the Earth to a depth at which apparent downward gravity was noticeably diminished; and would it be easier to dig such a tunnel or to go to the Moon?
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Post by dwight on Jun 15, 2008 21:06:46 GMT -4
So now it wasn't Area 51, it wasn't Flagstaff, it wasn't the Australian desert, it wasn't a 3km wide vacuum sealed dome, it was a cavern dug to an excessive depth? Wow the hoax theory gets more colorful by the day.
BTW Jay, given the amount of time it took the Eurotunnel teams just to dig the 36km cross channel tunnel and coming from both sides at the same time, the NASA cavern would have had to start at least 20 years before 1969, wouldn't it?
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Post by pzkpfw on Jun 15, 2008 21:51:12 GMT -4
What about the air pressure and overall temperature at that magic depth?
(The air pressure would make it hard to create a vacuum, wouldn't it?)
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Post by grashtel on Jun 15, 2008 22:16:22 GMT -4
If gravity decreases while approaching the center of the Earth, how far down would this cavern have to be to simulate the moon's gravity? A quick and dirty guesstimate based on their relative diameters and densities is somewhere on the upper side of 4,000km, which considering that the deepest borehole ever dug is only 12.26km seems just a teensy bit impossible. And that is before considering the numerous problems, such the fact that its rather hard to dig through molten rock, finding a material to survive the fantastic pressures and temperatures, digging the hole fast enough to be useful (ie not having to start sometime prior to the discovery of America), and disposing of the material from the hole.
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Post by JayUtah on Jun 15, 2008 23:09:27 GMT -4
...the NASA cavern would have had to start at least 20 years before 1969, wouldn't it?
Longer, in the days before modern TBMs.
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Post by Data Cable on Jun 16, 2008 2:58:42 GMT -4
finding a material to survive the fantastic pressures and temperatures Bah, just cook up a batch of unobtanium.
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Post by tedward on Jun 16, 2008 7:26:04 GMT -4
I heard that if you go too deep then the Earth will pop just like a large balloon. That is why they wore those big overshoes. So as not to puncture anything as they were so deep.
Turning it on its head, how high would you have to go? Giant zeppelin in space with magnets under the floor for metal soled boots at the right level?
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Post by inconceivable on Jun 16, 2008 10:17:49 GMT -4
Gravitational anomalies are found around the world. Maybe a pre existing cavern was found?
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Post by echnaton on Jun 16, 2008 10:36:29 GMT -4
Gravitational anomalies are found around the world. Like the so called gravity hills? We know those are not anomalies. Care to tell us where some others are? Maybe a pre existing cavern was found? I saw on TV this morning that a new movie of Journey to the Center of the Earth is coming out this summer. Perhaps it is a documentary?
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Post by JayUtah on Jun 16, 2008 10:40:48 GMT -4
Gravitational anomalies are found around the world.
Identify a pre-existing anomaly whose magnitude approaches or exceeds 5/6 G. In fact, identify such an anomaly whose magnitude exceeds 0.1% G.
And answer my first questions.
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Post by sts60 on Jun 16, 2008 10:43:43 GMT -4
inconceivable, are you just here to yank our chains, or do you ever intend to acknowledge the answers given to you?
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Post by Data Cable on Jun 16, 2008 12:16:22 GMT -4
Turning it on its head, how high would you have to go? Oh, about a quarter-million miles would probably do.
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