Explain why a total solar eclipse or total lunar eclipse does not occur at least once a month?

Answer 1

We don't get a lunar eclipse (earth obscuring the sun to the moon) or a solar eclipse (moon obscuring the sun to earth) every month, since the alignment of the sun, moon and Earth is not exact enough. The moon sun and earth are not on the exact same plane, so most of the time when the moon passes in front of the sun, it is either too low or too high to cause a solar eclipse. Similar story with the moon passing behind the Earth for a lunar Eclipse.

Answer 2

In my own opinion, a total solar eclipse or a total lunar eclipse wouldn't happen atleast once a month because of our axis proportional to the sun, and the axis of our moon on earth. Also, one unique feature of eclispes on earth is that they are only seen fully or just seen at all at certain spots accross the globe. In complex terms, the light that comes from a star (sun) that is blocked by a heavenly body from another is not world-widely seen. The axis of the moon is tilted on earth. Lucky are we that the distance and the size of our moon from our planet is somewhat proportionate to eclipses otherwise total eclipses will be just a fatansy, an event just watchable throught the use of media, as what the outer planets experience. Speed of the revolution of the 2 smaller heavenly bodies (Earth and Moon) also affects eclipses. In summary, the three factors affecting the event is the axes, the size of heavenly bodies, and the speed of revolution.