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 …
Matter in Motion: Earth's Changing Gravity | NASA Earthdata
Dec 28, 2020 · 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 …
StarChild: Glossary - NASA
A cluster of stars, dust, and gas held together by gravity. GAMMA-RAYS Penetrating short wave electromagnetic radiation of very high frequency. GEOSYNCHRONOUS An orbit in which a …
StarChild: Glossary - NASA
GRAVITY The invisible force between objects that makes objects attract each other. GRAVITATIONAL PULL The attraction that one object has for another object due to the …
Getting at Groundwater with Gravity | NASA Earthdata
Dec 28, 2020 · This project, called the Gravity Recovery and Climate Experiment (GRACE), measures changes in the Earth’s gravity. But how do gravitational differences tell scientists …
How do we know that dark matter exists? - NASA
The cluster does not behave as scientists would expect it to if only the visible matter is generating the gravity present in the cluster. 'Dark matter' theory suggests that a huge amount of dark …
Glacier Power: How do Glaciers Move? | NASA Earthdata
3 days ago · The ice flows like a conveyor belt driven by gravity and ever mounting snows. Ablation Zone: Where the glacier loses ice through melting, calving, and evaporation Output …
Trends in Global Freshwater Availability from the Gravity Recovery …
Jan 1, 2002 · 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 …
Sir Isaac Newton - NASA
As the years progressed, Newton completed his work on universal gravitation, diffraction of light, centrifugal force, centripetal force, inverse-square law, bodies in motion and the variations in …
Gravity Wave | NASA Earthdata
Feb 27, 2025 · Gravity Wave. A wave disturbance in which buoyancy acts as the restoring force on parcels displaced from ...