We all know and are proud that the first artificial Earth satellite was launched in the USSR ... according to the trend of further development, we should now fly to other planets and populate the whole and the entire Solar System ... and not play smartphones ... or surf the Internet ... as now, damn it ... well, at least not in cars to travel but on private jets ...
So ... the idea ... now many artificial Earth satellites fly in a geostationary orbit of 36,000 km there have already been so many that there will be accidents due to a collision ...
In short ... between the Earth and the Moon somewhere around 384,000 km ... on this segment there is such a point where the force of gravity of the Earth is equal to the force of gravity of the moon ... so having estimated it can be said that this distance is approximately ... 384000/6 = 64,000 km from the Moon (gravity on the Moon is 6 times less than Earth, respectively, Earth is 6 times more) ...
At this point, you can launch an artificial satellite common to the Earth and the Moon ... You ask how this satellite will transfer from the Earth to the lunar orbit. .. Very simple - the moon’s orbit is round and elliptical (the apogee of the Moon is farther from the Earth, the perigee is closer) ... that is, at the apogee of the Moon’s orbit, the earth attracts more and the artificial satellite passes into the Earth’s orbit ... and gives it at perigee The moon ... in this way there can be continuous monitoring of not only the Earth, but also of the Moon's surface ... in theory, it is possible to monitor other planets ... Earth-Venus, Earth-Mars ... and so on ...