The transfer of Earth's rotational momentum to the Moon's orbital momentum as tidal friction slows the Earth's rotation. That increase in the Moon's speed is causing it to slowly recede from Earth (about 4 cm per year), increasing its orbital period and the length of a month as well.
To picture what is happening, imagine yourself riding a bicycle on a track built around a Merry-go-Round. You are riding in the same direction that it is turning. If you have a lasso and rope one of the horses, you would gain speed and the Merry-Go-Round would lose some. In this analogy, you and your bike represent the Moon, the Merry-Go-Round is the rotating Earth, and your lasso is gravity. In orbital mechanics, a gain in speed results in a higher orbit.
The slowing rotation of the Earth results in a longer day as well as a longer month. Once the length of a day equals the length of a month, the tidal friction mechanism will cease. (ie. Once your speed on the track matches the speed of the horses, you can't gain any more speed with your lasso trick.) That's been projected to happen once the day and month both equal about 47 (current) days, at the current rate billions of years in the future. If the Earth and Moon still exist, the Moon's distance will have increased to about 135% of its current value.
Therefor it is concivable that days at an early point in history were tremendously shorter than they are currently. This allows for the ages in Gensis to be accurate and still not disrupt the number of years given to all men. This however brings into my mind a dellima. God stands outside of our ever changing concept of time. That being said what constitutes a day to God? How then considering the fluidity of time are we able to definitivly state that the earth is not billions of years old?
Just some food for thought and discussion
To picture what is happening, imagine yourself riding a bicycle on a track built around a Merry-go-Round. You are riding in the same direction that it is turning. If you have a lasso and rope one of the horses, you would gain speed and the Merry-Go-Round would lose some. In this analogy, you and your bike represent the Moon, the Merry-Go-Round is the rotating Earth, and your lasso is gravity. In orbital mechanics, a gain in speed results in a higher orbit.
The slowing rotation of the Earth results in a longer day as well as a longer month. Once the length of a day equals the length of a month, the tidal friction mechanism will cease. (ie. Once your speed on the track matches the speed of the horses, you can't gain any more speed with your lasso trick.) That's been projected to happen once the day and month both equal about 47 (current) days, at the current rate billions of years in the future. If the Earth and Moon still exist, the Moon's distance will have increased to about 135% of its current value.
Therefor it is concivable that days at an early point in history were tremendously shorter than they are currently. This allows for the ages in Gensis to be accurate and still not disrupt the number of years given to all men. This however brings into my mind a dellima. God stands outside of our ever changing concept of time. That being said what constitutes a day to God? How then considering the fluidity of time are we able to definitivly state that the earth is not billions of years old?
Just some food for thought and discussion