This was the first working reflecting telescope. Other designers proved unable to grind mirrors with a regular curvature, so the reflector remained largely a curiosity until the mid-18th century ...

The journey of astronomical telescopes began in the early 17th century when Galileo Galilei crafted his first refracting telescope in 1609. Although not the inventor of the telescope, Galileo was the ...

As the 18th century progressed ... They included explanations of astronomy, the ideas of Isaac Newton, and the discovery of Uranus in 1781. Almanacs also included explanations of natural phenomena ...