The first instrument to directly measure gravity on the surface of an asteroid has undergone testing in ESA's Mechanical Systems Laboratory. The GRASS gravimeter will be landed on the surface of the ...

Since the third Gaia data release in 2022, wide binary stars with separation greater than several thousand astronomical units have been intensely investigated across the world, to probe the nature of ...

Wide binary stars with separation greater than about 2000 astronomical units are interesting natural laboratories that allow a direct probe of gravity at low acceleration weaker than about 1 nanometer ...

Atom interferometry exploits the wave nature of ultracold atoms to measure gravitational acceleration and its spatial variations with exceptional precision. In a typical configuration, laser pulses ...

In a new study, physicists at JILA and the University of Colorado Boulder have used a cloud of atoms chilled down to incredibly cold temperatures to simultaneously measure acceleration in three ...

Quantum computers get a lot of attention, even though they are not ready for prime time, but quantum sensors are already doing useful work. These sensors measure fields, forces and motion so small ...

Smartphone-based measurement techniques harness the suite of microelectromechanical sensors embedded within modern mobile devices to transform them into portable, cost-effective laboratories for ...

Despite dozens of experiments over the years, scientists still don't have a precise measurement for gravity's strength. Why is that?