History of the telescope
The earliest known telescope appeared in 1608 in the Netherlands when an eyeglass maker named Hans Lippershey tried to obtain a patent on one. Although Lippershey did not receive his patent, news of the new invention soon spread across Europe. The design of these early refracting telescopes consisted of a convex objective lens and a concave eyepiece. Galileo improved on this design the following year and applied it to astronomy. In 1611, Johannes Kepler described how a far more useful telescope could be made with a convex objective lens and a convex eyepiece lens and by 1655 astronomers such as Christiaan Huygens were building powerful but unwieldy Keplerian telescopes with compound eyepieces.
Ming dynasty
Compared to the flourishing of science and technology in the Song dynasty, the Ming dynasty perhaps saw fewer advancements in science and technology compared to the pace of discovery in the Western world. In fact, key advances in Chinese science in the late Ming were spurred by contact with Europe. In 1626 Johann Adam Schall von Bell wrote the first Chinese treatise on the telescope, the "Yuanjingshuo" ("Far Seeing Optic Glass"); in 1634 the Chongzhen Emperor acquired the telescope of the late Johann Schreck (1576–1630). The heliocentric model of the solar system was rejected by the Catholic missionaries in China, but Johannes Kepler and Galileo Galilei's ideas slowly trickled into China starting with the Polish Jesuit Michael Boym (1612–59) in 1627, Adam Schall von Bell's treatise in 1640, and finally Joseph Edkins, Alex Wylie, and John Fryer in the 19th century. Catholic Jesuits in China would promote Copernican theory at court, yet at the same time embrace the Ptolemaic system in their writing; it was not until 1865 that Catholic missionaries in China sponsored the heliocentric model as their Protestant peers did. Although Shen Kuo (1031–95) and Guo Shoujing (1231–1316) had laid the basis for trigonometry in China, another important work in Chinese trigonometry would not be published again until 1607 with the efforts of Xu Guangqi and Matteo Ricci. Ironically, some inventions which had their origins in ancient China were reintroduced to China from Europe during the late Ming; for example, the field mill.