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What is gravity? - NASA Newton's "law" of gravity is a mathematical description of the way bodies are observed to attract one another, based on many scientific experiments and observations The gravitational equation says that the force of gravity is proportional to the product of the two masses (m 1 and m 2), and inversely proportional to the square of the distance (r) between their centers of mass Mathematically
Matter in Motion: Earths Changing Gravity - Earthdata This map, created using data from the Gravity Recovery and Climate Experiment (GRACE) mission, reveals variations in the Earth's gravity field Dark blue areas show areas with lower than normal gravity, such as the Indian Ocean (far right of image) and the Congo river basin in Africa Dark red areas indicate areas with higher than normal gravity
Gravity Wave - NASA Earthdata A wave disturbance in which buoyancy acts as the restoring force on parcels displaced from hydrostatic equilibrium
Trends in Global Freshwater Availability from the Gravity Recovery and . . . The Trends in Global Freshwater Availability from the Gravity Recovery and Climate Experiment (GRACE), 2002-2016, is a global gridded data set at a spatial resolution of 0 5 degrees that presents trends (rate of change measured in centimeters per year) in freshwater availability based on data obtained from 2002 to 2016 by NASA GRACE Terrestrial water availability storage is the sum of
Getting at Groundwater with Gravity - NASA Earthdata NASA’s twin Gravity Recovery and Climate Experiment (GRACE) satellites can detect groundwater by measuring subtle variations in Earth’s gravity This image shows the world’s average annual cycle of water storage on land, computed from four years of GRACE gravity data Colors indicate how much groundwater comes and goes, each year, in various regions; red indicates high levels of annual
Glacier Power: How do Glaciers Move? | NASA Earthdata A glacier is a large accumulation of many years of snow, transformed into ice This solid crystalline material deforms (changes) and moves Glaciers, also known as “rivers of ice,” actually flow Gravity is the cause of glacier motion; the ice slowly flows and deforms (changes) in response to gravity A glacier molds itself to the land and also molds the land as it creeps down the valley
StarChild: The Asteroid Belt - NASA An asteroid is a rocky body in space which may be only a few hundred feet wide or it may be several hundred miles wide They are considered to be debris left over from the formation of the solar system Many asteroids orbit the Sun in a region between Mars and Jupiter This "belt" of asteroids follows a slightly elliptical path as it orbits the Sun in the same direction as the planets It
ASDC Direct Data Download - NASA Earthdata NASA ASDC's Direct Data Download tool provides the ability to access and download all publicly available data collections via https