A tiny gold ball is the smallest object to have its gravity measured
Scientists measured the gravitational field of an object with a mass of just 90 milligrams
![gold sphere experiment set up](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2021/03/030921_ec_tinygravity_feat.jpg?fit=1030%2C580&ssl=1)
A gold sphere on a horizontal glass beam responds to the gravitational pull of a neighboring sphere (right). The measurement confirms that gravity behaves as expected even for very small objects.
Tobias Westphal/University of Vienna