In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

At the of age 30, he arrived at Mount Wilson Observatory in Southern California just in time to use the new Hooker 100-inch telescope, at the time the largest in the world. He began taking ...

The first telescopes refracted light, and today reflectors dominate, but there is a third way to make light focus, and it ...

offering significantly more impressive views than a 4-inch or 5-inch (100-130mm) refracting telescope, especially under dark/steady skies. Aperture sizes in more modern Dobsonian systems typically ...

NEO Surveyor will lift off atop a Falcon 9 rocket from Florida's Space Coast no earlier than September 2027. The total value ...

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Enter Edwin Hubble. Hubble and the Hooker 100-inch Telescope Hubble arrived at Mount Wilson in the fall of 1919, just as the Hooker 100-inch telescope was coming online. His timing couldn't have ...

The total cost to NASA for the launch service is approximately $100 million, which includes the launch ... consists of a single scientific instrument: an almost 20-inch (50-centimeter) diameter ...

This breakthrough represents a performance increase of 100 times or more compared to leading spy cameras and traditional telescopes ... achieved a then-best 1.97 inch (5 cm) resolution at a ...

The most recent arrival to the rarefied world of high-end sedans, the Genesis G90 deploys a vast array of up-to-the-minute ...