-
322 BCE
Aristotle
Greek philosopher who is considered "Father of Western Philosophy." In 335, Aristotle had found his own school and spent most of his life there studying, teaching, and writing. -
168
Ptolemy
A mathematician, astronomer, geographer, and astrologer. Also considered the Earth should be the center of the universe. Ptolemy was the one that made the universe go Earth(center), Moon, Mercury, Venus, Sun, Mars, Jupiter, and Saturn. -
1543
Copernicus
An astronomer who planed a model of the universe that placed the Sun instead of the Earth in the center of the universe. -
Tycho Brahe
Was a writer, astronomer, and nobleman who was known for his accurate astronomy observations. Had a model that every planet but the Earth went around the Sun, then the Sun went around the Earth. Brahe had hired a guy named Johannes Kepler to work with him. Brahe had a wife and eight children but died in 1601. -
Hans Lippershey
German Dutch spectacle maker. Was the first person to make the telescope. First person to try and get a patent for the telescope. Had the design of the refracting telescope. Was also the first who tried to obtain a patent (not letting anyone else take the idea) for the telescope. -
Johannes Kepler
Kepler’s three laws of planetary motion can be stated as follows: (1) All planets move about the Sun in elliptical orbits. (2) A radius joining any planet to the Sun sweeps out equal areas. (3) The squares of the sidereal periods (of revolution) of the planets are directly proportional of their mean distances from the Sun. -
Galileo
Italian astronomer, physicist, and engineer. Also been called "Father of the Scientific Method." Used the newly invented telescopes to discover four of the moons circling Jupiter, study Saturn, observe the phases of Venus, and study the sunspots on the sun. -
Giovanni Cassini
Italian mathematician, astronomer and engineer. Cassini is known for his work of astronomy and engineering. Around 1690, Cassini was the first to observe the rotation within Jupiter's atmosphere. -
Sir Issac Newton
English mathematician, physicist, astronomer, and author who is recognized as one of the most influential scientists of all time, and a key figure in the scientific revolution. His discovery of calculus (a particular method or system of calculation or reasoning.) Led the way to more powerful methods of solving math problems. -
William Herschel
German astronomer, composer (a person who writes music, especially as a professional) and the brother of the astronomer Caroline Herschel with who he had worked. On March,1781 William Herschel discovered what he first had thought to be a comet, but later then found out to be planet Uranus. -
Percival Lowell
American businessman, mathematician, and astronomer. He found the Lowell Observatory in Flagstaff, Arizona and turned out to be the beginning of the effort that led to the discovery of Pluto 14 years after he had died. He was best known for realizing there was life on mars. -
Karl Jansky
American physicist and radio engineer who first discovered radio waves in 1931. Jansky had invented the Radio telescope. He had discovered one of the men that have learned his discovery is named Grote Reber, did it by himself, built a radio telescope in his backyard and did the first survey of radio waves in the sky. -
Edwin Hubble
An American astronomer. He revolutionised the fields of astrophysics. In 1990, NASA launched a telescope called the Hubble Space Telescope into space to study and observe the distances of the universe. He had also proved that the light you see in the clouds at night are other galaxy's beyond our milky way. His greatest discovery was when he had classified the relationship between a galaxy's and the speed with where it is moving. -
Albert Einstein
A German physicist and mathematician. Won the Nobel Prize for his physics explanation of photoelectric (characterised by or involving the emission of electrons)effect. -
Sputnik
The first Earth satellite. The Soviet Union launched the satellite into a low Earth orbit in 1957, having it orbiting for three weeks before its batteries died. The satellite has 1440 orbits completed today. -
Ejnar Hertzsprung
Danish (the people of Denmark) chemist and astronomer. Classified by relating to their color and to their brightness. -
Yuri Gagarin
Gagarin was the first person in space, making a 108 minute orbital flight on his Vostok 1 spacecraft. His Vostok spacecraft completed one orbit around the whole Earth. -
Neil Armstrong 1969
Neil Armstrong was the first person to walk on the moon at 10:56 p.m. He was 240,000 miles away from Earth on the Apollo 11 spaceflight. -
The Apollo Program
The Apollo program was the third United States human spaceflight program which had been carried out by Space Administration, which then led to a human being able to land on the moon. -
1981 First Space Shuttle Flight
The STS-1 had been the first orbital spaceflight of NASA's Space Shuttle program. The First orbiter had launched on the 12 of April, 1981, and then returned on the 14 of April, later having orbited the Earth 36 times. -
1996 Mars Pathfinder Expedition
The Pathfinder had been launched on December 4, 1996 and landed on Mars on July 4, 1997. It was supposed to be a new way to deliver an instrument lander and the first ever robotic rover to ride on a red planet. Not only had the Pathfinder achieve its goal but had also brought back many data. -
1997 Cassini Orbiter
The Cassini mission was a collaboration (the action of working with someone to produce or create something) between NASA and the Italian Space Agency to send something that they can use to study the planet Saturn and its system, including its rings. -
John Glenn 1962
John Glenn became the first American to orbit the Earth. In 4 hours and 56 minutes, Glenn had circled the globe three times in his space capsule. Glenn had reached up to a speed more than 17,000 miles per hour. -
Difference between refracting and reflecting telescopes.
A refractor has lens, opposite the eyepiece end, which is to gather the light coming from a distance. A reflector uses two mirrors instead of lenses. Light from an object enters the telescope tube and is reflected off a curved mirror at the end of the tube. -
Maybe you really can use black holes to travel the universe
One of the most science scenarios is using a black hole a a portal to another dimension or time in the universe. This dense and hot singularity punches a hole in the fabric of space time itself, possibly opening up an opportunity for hyperspace travel.
