It took an array of four radio dishes positioned around the globe and an international team of astronomers to do it, but it was well worth the effort: Astronomers have measured the radius of a ...

This allows the nuclear radius to be determined with high precision. With the measurement of helium-3, the experiments on light muonic atoms have now been completed for the time being. The researchers ...

Measuring the Sun is tricky business, as direct observations rely on solar eclipses to get an accurate measurement of the Sun’s light-emitting photosphere. However, measurements in the 1990s using ...