With very few exceptions, stars are so distant that even powerful telescopes see them only as dimensionless specks of light. How, then, can we know their sizes? Fortunately, there’s a simple ...

Astronomers have developed a new way of measuring cosmic distances by listening to the frequencies of "music" played by vibrating stars that collectively act as a vast orchestra of different cosmic ...

NASA's New Horizons probe was able to help measure the distance between two stars and our home system thanks to its distant location. The probe's images of the stars were compared with images of those ...