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.
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 …
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. …
Gravity/Gravitational Field - NASA Earthdata
5 days ago · Data from NASA satellite observations provide information about Earth's mean gravity field and inform monthly maps of the time-variable gravity field, both of which are useful …
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 …
StarChild: Did you know... (The Sun) - NASA
The Sun's gravitational pull is so strong that a 100 pound person would weigh 28 times that, or 2800 pounds, on the Sun.
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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 …
StarChild: Galaxies - NASA
A galaxy contains stars, gas, and dust which are held together as a group by gravity. There may be millions, or even billions, of stars in one galaxy. There are billions of galaxies in the …