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 …
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
6 days ago · 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 detect changes to it. …
Glacier Power: How do Glaciers Move? - NASA Earthdata
2 days ago · 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, also …
StarChild: Glossary - NASA
GRAVITATIONAL PULL See Gravity GRAVITY The force of attraction between two objects which is influenced by the mass of the two objects and the distance between the two objects. GYROSCOPE …
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 (invisible to …
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 energy is …
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 involved and the …
StarChild: Galaxies - NASA
A galaxy is a cluster of stars, dust, and gas which is held together by gravity. Galaxies are scattered throughout the universe and they vary greatly in size. A galaxy may be alone or it may be in a large …
Crustal Dynamics Data Information System - NASA Earthdata
Nov 14, 2012 · NASA's Crustal Dynamics Data Information System (CDDIS) provides data and information to support the international space geodesy community.