Measuring the gravitational constant with antimatter

This might not be the most intuitive way to measure g, the gravitational acceleration constant. Nevertheless, this is what a team of about 50 scientists from the AEgIS collaboration (Antihydrogen Experiment - Gravity, Interferometry, Spectroscopy) is trying to achieve. This might soon become even easier, thanks to a recently approved new project to build ELENA, a new decelerator for antiprotons.

via Quantum Diaries