As indicated in the articleThe-paradox-of-gravity-not-respecting-the-energy-conservation-principle/ satellites are subject to a double different force, the gravitational one and the centrifugal one. This implies that the nearer a satellite is orbiting around the earth, the faster it has to move to win the bigger gravitational force and the other way round. To better describe this idea we have to introduce the concept of angular moment. This is the product of the impulse of the satellite ( I=mxv where I is the impulse, m is the mass of the satellite and v its speed) and the distance of the satellite from the Earth, R. Read more
The reproducible reality
Math is the key to understand and describe the universe. The question is: can we consider the opposite situation always true? I mean, is it possible to reproduce in the real world all the ideal abstractions that are possible in the math world? Read more
A body orbiting around a planet is in equilibrium between two forces: the centrifugal force and the gravitational force
where Fc is the centrifugal force, Fg is the gravitational force, m1 is the mass of the orbiting body, m2 is the mass of the planet, v is the speed of the body while orbiting, r is the distance of the body from the center of the planet, G is the gravitational constant
. Read more
The Earth map used in the UN flag: 33 sectors
A grid, probabl
y representing parallels and meridians, divides the Earth in 33 sectors. Another special number is 11, 33 being a multiple of it. You probably wonder what it means and what relation have these numbers with the Earth.
33 appears immediately as a particular number, being a palindrome. Moreover 3×3=9; 33×3=99… another palindromic digit I like is the number 12321. If you sum all digits, you’ll obtain 9 again. Read more
Polaris is a particular star. It is almost exactly over the North Pole. This position makes this star perfect to do some calculation in relation to the Earth.