Vibrating Stars Measure Distance

Scientists have discovered a faultless new way to measure the distance of things. They do so by picking up the waves of vibrating stars, formally known as Cephieds.

Cephieds have been used as distance measurers for almost a hundred years, but the new technique is purely geometrical and does not rely upon any hypotheses about the physics of the stars themselves. This is due to the release of ESO's newest telescope, which measure Cephieds to a one percent precision level.

Pretty cool. I cannot really explain the technicalities of exactly how they measure the light waves (also referred to as light echoes), but there are more details to be discovered in the article: www.astronomy.com/asy/default.aspx?c=a&id=6612.