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

Until then, the largest optical telescope in the Western Hemisphere had been the 200-inch (5.1-meter) Hale Telescope, built in 1949 on Mount Palomar in California and used by Edwin Hubble in the ...

Its 200-inch telescope was a marvel of engineering when Caltech founder Gregory Hale built it in the 1930s and 1940s. It finally saw “first light” — astronomers’ term for a telescope’s ...

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We are at a critical time and supporting climate journalism is more important than ever. Science News and our parent organization, the Society for Science, need your help to strengthen ...

As US astronomers cheer the completion of the state-of-the-art project to rejuvenate the iconic Hale Telescope, one key collaborator is locked out of the celebrations and banned from exporting to ...

Hubble used more than 10 years of data and more than 600 images of 200 million stars to generate the breathtaking photomosaic. Launched in 1990, the Hubble Space Telescope is a joint ESA/NASA project.