Skip to main content
The GRASS gravimeter being tested

The first instrument to directly measure gravity on the surface of an asteroid has undergone testing at ESTEC, The Technical Centre of European Space Agency. 

The GRASS gravimeter will be landed on the surface of the Dimorphos asteroid aboard the Juventas CubeSat – which will itself be deployed from ESA’s Hera mission for planetary defence – and is designed to measure an expected gravity level of less than a millionth of Earth’s own.

Read more about the gravimeter, Dimorphos and Hera mission at: