
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 · A new satellite mission sheds light on Earth's gravity field and provides clues about changing sea levels.
Gravity/Gravitational Field - NASA Earthdata
Sep 30, 2025 · Gravity is the field around physical bodies, such as planets, that draws objects toward its center. Earth's gravitational field can be measured by orbiting satellites that can …
Glacier Power: How do Glaciers Move? - NASA Earthdata
Sep 30, 2025 · Glaciers Are Solid Rivers A glacier is a large accumulation of many years of snow, transformed into ice. This solid crystalline material deforms (changes) and moves. Glaciers, …
StarChild: Stars - NASA
Gravity causes the last of the star's matter to collapse inward and compact. This is the white dwarf stage which is extremely dense. White dwarfs shine with a white hot light but once all of their …
Teachers' Center Activity: Gravity Effects on Planet Motion - NASA
1. Introduction: Review the definition of gravity Drop a ball and explain why it falls downward Explain that the strength of a gravitational pull is determined by the masses of the objects …
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 …
Sir Isaac Newton - NASA
As the years progressed, Newton completed his work on universal , diffraction of light, centrifugal force, centripetal force, inverse-square law, bodies in motion and the variations in tides due to …
Getting at Groundwater with Gravity - NASA Earthdata
Dec 28, 2020 · Publication from NASA ESDIS describing research uses of data from EOSDIS - scientists use a pair of new satellites to keep up with groundwater resources.