Probably Galileo Galilei (Astronomer and Physicist, 1564 -1642)
Galileo was the first to use a telescope for major discoveries, around the year 1610.
Nicolaus Copernicus is the Polish mathematician and astronomer known for his heliocentric theory, which posited that the Earth and other planets revolve around the Sun. This discovery fundamentally changed our understanding of the structure of the universe and marked a major advancement in the history of science.
Newton's first major public scientific achievement was the invention, design and construction of a reflecting telescope.
Titania and Oberon are two of the five major moons of Uranus. They were discovered by William Herschel in 1787.
He was the first European to land in North America.
Louis Joliet's major discoveries was the Mississippi River which he paddled 2500 miles to get to
thomas Edison discoveries
The telescope
Galileo Galilei is one of the most famous astronomers in history. One of his major accomplishments was the improvements he made to the telescope. Galileo is known for greatly advancing the scientific revolution.
The Englishman, Leonard Digges (1520-1559), from Bartham in Kent, UK, invented the Theodolite in 1551...The main component of a Theodolite is a small but powerful refracting telescope, so he was almost certainly the very first person in the world to invent the refracting telescope. However, it is known that he also invented the reflecting telescope shortly afterwards. In 1608, Hans Lippershey, a German born Dutch citizen invented a refracting telescope in Middelburg, Netherlands. Galileo's model a year later was a considerable improvement upon Lippersheys design but it came almost 60 years after Digges's invented his telescope. The Gregorian reflecting telescope was invented by Scottish mathematician and astronomer James Gregory and his design was first published in 1663. Isaac Newton invented the Newtonian reflecting telescope in 1668, 117 years after Digges invented his. The design of the Cassegrain telescope was first published on April 25th 1672 and its invention is attributed to Laurent Cassegrain (1629-1693), a Catholic priest from Chartres, France. There were no real major advances in telescope designs until the Schmidt telescope was invented, by German optician Bernhard Schmidt, in 1930. The Maksutov telescope was patented in 1941 by Russian optician Dmitri Maksutov.
fossils
Gujrat