The journey of astronomical telescopes began in the early 17th century when Galileo Galilei crafted his first refracting ...

That's why Palomar Observatory, Caltech’s research station in north San Diego County, isn’t using its iconic 16-foot-wide Hale telescope under its massive white dome. Instead, it's using a ...

As US astronomers cheer the completion of the state-of-the-art project to rejuvenate the iconic Hale Telescope, one key ...