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  • What is gravity? - NASA
    Furthermore, he deduced that gravity forces exist between all objects 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
  • Matter in Motion: Earths Changing Gravity - NASA Earthdata
    A new satellite mission sheds light on Earth's gravity field and provides clues about changing sea levels
  • Gravity Gravitational Field - NASA Earthdata
    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 tools for scientists as they study the planet's changing climate
  • 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 A heavy wheel or disk mounted so that its axis can turn freely in one or more directions A spinning gyroscope tends to resist change in the direction of its axis
  • 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 distance between the objects Hold up a scale model of Earth and a scale model of the Sun Inquire as to which object would exert a stronger pull
  • 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 gone, they die The star has now reached the black dwarf phase
  • 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
  • Earthdata
    Earthdata
  • Matter in Motion: Earths Changing Gravity - Earthdata
    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 with lower than normal gravity, such as the Indian Ocean (far right of image) and the Congo river basin in Africa Dark red areas indicate areas with higher than normal gravity
  • Gravity Recovery and Climate Experiment | NASA Earthdata
    The NASA German Space Agency (DLR) Gravity Recovery and Climate Experiment GRACE Follow-on (GRACE and GRACE-FO) platforms each consist of two identical satellites that act in unison as the primary instrument The two satellites comprising each mission orbit one behind the other in the same orbital plane at an approximate distance between the two satellites of 220 km (137 miles) As the





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