From magnification to light-gathering, here’s how to make the decision between buying a telescope or a monocular for stargazing and astronomy. When you purchase through links on our site, we may earn ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. overall: 4 1/2 in x 56 3/4 in x 4 1/2 ...

Chinese scientists are working to set up the world's largest refracting telescope in Tibet Autonomous Region for observing stars and planets. Construction for the optical telescope, with a 1-meter ...