Ranger
![Ranger](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ranger_lowres.jpg?itok=DoR2HW2k)
Detailed Description
The Ranger seismometer was developed in the late 1950/s for a hard (in excess of about 3kg or 6.6lbs) landing on the Moon. The mass weighs about 1.5 kg (about 3.3 lbs) and is actually a suspended ring magnet.
Sources/Usage
Public Domain.