In 1609, Galileo Galilei succeeded in improving the refracting telescope, which had first appeared in the Netherlands a year earlier, to achieve higher magnification. He used this telescope to observe ...

NASA's next flagship mission — the James Webb Space Telescope — will carry the largest primary mirror ever deployed. This segmented behemoth will unfold to 21.3 feet in diameter once the observatory ...

MAUNAKEA, HAWAII — Jerry Nelson, the mastermind behind the revolutionary segmented mirror design of W.M. Keck Observatory telescopes, passed away Saturday at his home in Santa Cruz, California. He was ...

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After four years of planning and an intricate moving process, the Naval Postgraduate School on Tuesday celebrated the arrival of a 3-meter-wide segmented mirror telescope. The multi-million-dollar ...

Finding life beyond our solar system is a major goal of modern astronomy. NASA's planned Habitable Worlds Observatory (HWO) ...