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100
Ptolemy
Ptolemy is an alexandrian astronomer who proposed a geocentric system of astronomy. Also he is a mathematician who considered the earth the center of the universe. -
384
Aristotle
Aristotle was a Greek philosopher who made important contributions by summarizing deductive logic and wrote on physical subjects. His philosophy had a long-lasting influence on the development of all Western philosophical theories. Aristotle was one of the greatest thinkers in his time which was around 300-400 B.C. -
1473
Copernicus
Copernicus named the sun sun and he thinks that the earth is not the center of the universe. Also The father of modern astronomy, Polish astronomer Nicolaus Copernicus was the first modern European scientist to propose that Earth and other planets revolve around the sun. -
1546
Tycho Brahe
Tycho Brahe is a danish astronomer whose worked in developing astronomical instruments and in measuring and fixing the positions of stars paved the way for future discoveries. Also with his inventions he saw the sun orbit. -
1564
Galileo
Galileo discovered four of jupiter's moons almost four hundred years ago. Also Galileo was an italian psychist and astronomer. Later that year he became the first person to look at the moon through a telledcope. -
1570
Hans Lippershey
Hans Lippershey was a german-dutch spectale maker. He is commenly associated with the invention of the telescope,because he was the first one who tried to obtain a patent for it. -
1571
Johannes Kepler
Johannes Kepler was a german astronomer who discovered three major laws of planetery. -
Giovanni Cassini
Giovanni Cassini was an italian mathmatician, astronomer and engineer. Also during the Scientific Revolution, which took place between the 15th and 18th centuries, numerous inventions and discoveries were made that forever changed the way humanity viewed the unvierse. -
Sir Issac Newton
Sir Issac Newton was also an English Scientists and mathmatician, Sir Issac Newton was most famous for his law of gravitation, and was instrumental in the scientific revolution of the 17th century. Issac Newton had so many theories on light and so many ideas about in his life that's about all he would care about just light and how he could improve on light. -
William Herschel
Born in Hanover, Brunswick on November 15, 1738, William Herschel’s father was a musician who worked for the German Army. Following the French invasion of Hanover in 1757, his father sent him to seek refuge in England, where Herschel became a music teacher and composer. -
Percival Lowell
Percival lowell was an American businessman, author, mathematician, and astronomer who fueled speculation that there were canals on Mars. He founded the Lowell Observatory in Flagstaff, Arizona and formed the beginning of the effort that led to the discovery of Pluto 14 years after his death. -
Percival Lowell
Percival Lawrence Lowell was an American businessman, author, mathematician, and astronomer who fueled speculation that there were canals on Mars. He founded the Lowell Observatory in Flagstaff, Arizona and formed the beginning of the effort that led to the discovery of Pluto 14 years after his death. -
Ejnar Hertzprung
Danish astronomer who classified types of stars by relating their colour to their absolute brightness—an accomplishment of fundamental importance to modern astronomy. Also Perhaps his greatest contribution to astronomy was the development of a classification system for stars to divide them by spectral type, stage in their development, and luminosity. -
Albert EInstein
Albert EInstein was an German-born physicist who developed the special and general theories of relativity and won the Nobel Prize for Physics in 1921 for his explanation of the photoelectric effect. -
Edwin Hubble
Edwin Hubble was an creator who made some of the most important discoveries in modern astronomy. As an astronomer, Dr. Hubble was a late bloomer. Also Hubble's name is most widely recognized for the Hubble Space Telescope which was named in his honor, with a model prominently displayed in his hometown of Marsh field, Missouri. -
Karl Jansky
Karl Jansky was an American physicist and radio engineer who in August 1931 first discovered radio waves emanating from the Milky Way. He is considered one of the founding figures of radio astronomy. Also -
John Glenn
John Glenn was an A Marine pilot, he was selected in 1959 for Project Mercury astronaut training. ... After his decorated service in the U.S. Marine Corps and NASA, Glenn went on to serve as U.S. Senator from his home state. -
Neil Armstrong
Neil Armstrong was an astronaut who joined NASA and joined a space adventure in 1942 and was the command pilot of the team. he also joined an astronaut program in 1962 and went on another space mission to go and plant the flag on the moon. -
Sputnik
Sputnik was the world's first artificial satellite was about the size of a beach ball 58 cm.or 22.8 inches in diameter weighed only 83.6 kg. or 183.9 pounds, and took about 98 minutes to orbit the Earth on its elliptical path. -
The Apollo Program
The Apollo Program was designed to land humans on the Moon and bring them safely back to Earth. -
Yuri gargarin
He became the first human to journey into outer space when his spacecraft completed one orbit of the Earth on 12 April 1961. Also Gagarin became an international celebrity and was awarded many medals and titles, including Hero of the Soviet Union, his nation's highest honor. -
First Space Shuttle Flight
The first launch of the Space Shuttle occurred on 12 April 1981, exactly 20 years after the first manned space flight, when the orbiter Columbia, with two crew members, astronauts John W. Young, commander, and Robert L., pilot, lifted off from Pad A, Launch Complex 39, at the Kennedy Space Center. -
Mars Pathfinder Expedition
Mars Pathfinder Expedition was an designed as a technology demonstration of a new way to deliver an instrumented lander and the first-ever robotic rover to the surface of the red planet. They also used that little car to scan for little living things or anything to see if there were living objects. -
Cassini Orbiter
Cassini Orbiter was a collaboration between NASA, the European Space Agency, and the Italian Space Agency to send a probe to study the planet Saturn and its system, including its rings and natural satellites. -
Difference between refracting and reflecting telescopes
A reflector telescope uses two mirrors instead of two lenses. Isaac Newton developed this telescope to combat chromatic aberration (a rainbow seen around some objects viewed with a re fractor telescope). ... Secondly, the mirror might not be a perfect curve, so the image being reflected will not come to a perfect point. -
Current Astronomy Event (black Holes)
One of the most cherished science fiction scenarios is using a black hole as a portal to another dimension or time or universe. That fantasy may be closer to reality than previously imagined. Black holes are perhaps the most mysterious objects.
