The Moon, just to continue the discussion in the previous post, also turn around itself, as do the sun and the earth. Everyone knows that the earth goes round on itself in 24 hours, and this ride we call it day. Not all people know that the moon rotates on itself much more slowly: it takes the equivalent of 27 Earth days and 8 hours ... look a bit the same time it takes to make a circle around the earth. The two motions, combined, produce a particular effect, namely to always show the same face to the ground and deny each other forever.
In reality, this does not happen by chance synchrony. We say that the two celestial bodies, earth and moon, with time (a few billion years ...) have "agreed" on a certain distance (which is still growing), and certain movements that maintain the system in balance. About
balls that turn the sun revolves around itself in a non-uniform: about 25 days in Earth's equator, the poles is slower, it takes 34. The intriguing thing is done ...
0 comments:
Post a Comment