Back Swaartekrag Afrikaans Gravitation ALS ግስበት Amharic Gravedat AN गुरुत्वाकर्षण ANP جاذبية Arabic جابدية ARY جاذبيه ARZ মহাকৰ্ষণ Assamese Gravedá AST

Gravity

Gravity, or gravitation is one of the fundamental forces of the universe. It is an attraction, or pull, between any two objects with mass. We discuss it here in three parts:

Artist concept of Gravity Probe B orbiting the Earth to measure space-time, a four-dimensional description of the universe including height, width, length, and time.
  1. Everyday sense: the force which causes objects to fall to the ground
  2. Newton's laws: how gravity keeps the Solar System and most major astronomical objects together
  3. Einstein's theory of general relativity: the role of gravity in the universe

Some physicists think gravity is caused by gravitons, but they are still unsure.

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