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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 …
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 …
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 …
The Case of the Missing Waves | NASA Earthdata
Dec 28, 2020 · Gravity waves are a real challenge because they are largely invisible to climate and weather models. The crux of the problem is the way satellites see them. Satellite …
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
Jun 2, 2025 · 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 …
Gravity Wave | NASA Earthdata
Feb 27, 2025 · Gravity Wave. A wave disturbance in which buoyancy acts as the restoring force on parcels displaced from ...
Graviti - Data Platform to Accelerate AI and Machine Learning
“Graviti data platform has become a key part of our AI development process. It is powerful and works seamlessly with our workflows, increasing our productivity and efficiency in data …
Where did the Moon come from? - NASA
StarChild Question of the Month for October 2001 Question: Where did the Moon come from? Answer: Any theory which explains the existence of the Moon must naturally explain the …