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- From: mcirvin@husc8.harvard.edu (Mcirvin)
- Newsgroups: sci.physics
- Subject: Re: NASA Coverup
- Keywords: Moon Neutral Point calculation
- Message-ID: <mcirvin.721009004@husc8>
- Date: 6 Nov 92 00:16:44 GMT
- Article-I.D.: husc8.mcirvin.721009004
- References: <4576@cruzio.santa-cruz.ca.us> <1992Nov4.223922.23913@u.washington.edu>
- Lines: 41
- Nntp-Posting-Host: husc8.harvard.edu
-
- whit@carson.u.washington.edu (John Whitmore) writes:
-
- [quoting Snarfy]
-
- >> Throughout the fifties and sixties , the so called "neutral point"
- >> where the gravitational forces of the earth-moon system balance,was
- >> given over and over again as being between 22,100 and 25,200 miles from
- >> the surface of the moon in the direction of the earth.
-
- > Given by who? It doesn't follow from anything I see in
- >the data, nor do you give any attribution.
-
- Judging from calculations I just did, I think this range comes from
- there being at least two different "neutral points" in question; the low
- number looks about right for the place where gravitational forces
- balance, and the high number is probably the Lagrange point where an
- object will orbit the earth in step with the moon.
-
- >> The July 25th , 1969 issue of TIME magazine stated that the Neutral
- >> Point was 43,495 miles from the center of the moon. Werner von Braun
- >> stated in the 1969 edition of "History of Rocketry and Space Travel"
- >> that the neutral point was 43,495 miles the center of the moon . The
- >> pre-Apollo distances were given as 20,000 to 25,000 miles from the
- >> center of the moon.
-
- > Given by whom? Either there is a second definition involved, or
- >SOMEONE made an error. Several someones, if the range of 20,000 to 25,000
- >is to be believed. Again, I see no source for the questionable numbers.
-
- Someone who redirected the thread to alt.sci.physics.new-theories
- suggested that this was the result of a typo, since the number is
- very close to the distance of the Lagrange point from the moon in
- *kilometers* rather than miles. I suspect this may be the case.
-
- Note that the Lagrange point, not the balancing-forces point, is
- the spot around which you can actually orbit things; in the rotating
- frame, it's a saddle point of the effective potential, with the
- stable direction transverse to the earth-moon line.
-
- --
- Matt McIrvin
-