Read More: Gravity mysteries: Why is gravity so weak? https://www.newscientist.com/article/... “Gravity is a real weakling – 1040 times weaker than the electromagnetic force that holds atoms together. Although the other forces act over different ranges, and between very different kinds of particles, they seem to have strengths that are roughly comparable with each other. Gravity is the misfit. Why should this be so?”
GOCE Reveals Gravity Sip From Ice Loss http://www.esa.int/Our_Activities/Obs... “The strength of gravity at Earth’s surface varies subtly from place to place owing to factors such as the planet’s rotation and the position of mountains and ocean trenches. Changes in the mass of large ice sheets can also cause small local variations in gravity.”
An answer to a lunar mystery: Why is the moon’s gravity so uneven? http://news.mit.edu/2013/an-answer-to... “As it turns out, the cause of such bumpy orbits was the moon itself: Over the years, scientists have observed that its gravity is stronger in some regions than others, creating a “lumpy” gravitational field. In particular, a handful of impact basins exhibit unexpectedly strong gravitational pull.”
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