The force of the moon’s gravity on earth causes tides. Due to the difference between the strength on the moon’s force on different parts of the earth, a tidal force is created. This tidal force, could also be referred to as a “stretching force,” as it creates two tidal bulges, with one being larger on the side of earth that faces the moon (Bennett et. al, pg. 128).
Not only is there a tidal effect on the moon, there is a tidal effect on the sun. The gravitational force between the sun and the earth is much stronger than the force between the earth and the moon, due to the sun’s large mass. However, because the distance between the earth and the sun is so great, the pull between the different sides of the earth is quite minimal. The tide force caused by the sun is less than half of the force caused by the moon (Bennett et. al, pg. 129).
When the tidal forces of the sun and moon work in tandem, we get spring tides, which are pronounced. We see this at new moon and full moon. When the tidal forces of the sun and moon counteract each other, we get neap tides, which are relatively small. We see this at first-quarter moon and third-quarter moon (Bennett et. al, pg. 129).
Solar System Discovery 
Leave a comment