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**r7rGOhvd** · 09-09-2012, 02:31 AM

Actually, from my understanding, most Moon probes either fell short or overflew the Moon

As I have stated years ago, the Moon-Earth L1 is not known now (?) nor then....
[I have an accurate number]
This meant that a probe could not enter the Moon's spin space with a minimum known velocity
as well an orbit around the Moon is quite eccentric.
It was all hit or miss back then... there was no scientific logic involved.

I am sure that today the hit/miss parameters are a little more worked out... but I suspect Moon-Earth L1 is still only an approximation at all space centres.

Mars is an entirely different set of parameters... circular orbits..known velocities...atmosphere... L1 known (I suspect at least a reasonable approximation)

It is much much easier to land on Mars than on the Moon.

09-09-2012, 02:31 AM	#32
r7rGOhvd Join Date Oct 2005 Posts 458 Senior Member	Actually, from my understanding, most Moon probes either fell short or overflew the Moon As I have stated years ago, the Moon-Earth L1 is not known now (?) nor then.... [I have an accurate number] This meant that a probe could not enter the Moon's spin space with a minimum known velocity as well an orbit around the Moon is quite eccentric. It was all hit or miss back then... there was no scientific logic involved. I am sure that today the hit/miss parameters are a little more worked out... but I suspect Moon-Earth L1 is still only an approximation at all space centres. Mars is an entirely different set of parameters... circular orbits..known velocities...atmosphere... L1 known (I suspect at least a reasonable approximation) It is much much easier to land on Mars than on the Moon.
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