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384 BCE
Aristotle
Geocentric belief.Everything moved in perfect circles and was a perfect circle. -
100
Ptolemy
The Earth is in the center of the universe. The sun moon planets and stars move in a perfect path; a circle. -
1473
Copernicus
In his book, "De Revolutionibus Orbium Coelestium" Copernicus established that the planets orbited the sun rather than the Earth. He laid out his model of the solar system and the path of the planets. -
1546
Tycho Brahe
He made some of the most accurate observations of planetary positions which would eventually prove useful to his predecessors. -
1564
Galileo
Discovery of the four most massive moons of Jupiter. All of his telescope discoveries -
1570
Hans Lippershay
He invented the telescope. His telescope had a concave eyepiece aligned with a convex objective lens. -
1571
Johannes Kepler
He discovered three major laws of planetary motion, conventionally designated as follows(1)All planets move about the Sun in elliptical orbits, having the Sun as one of the foci.(2)A radius vector joining any planet to the Sun sweeps out equal areas in equal lengths of time.(3)The square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit. This captures the relationship between the distance of planets from the Sun, and their orbital periods. -
Giovanni Cassini
Cassini discovered four satellites of the planet Saturn and noted the division of the rings of Saturn; the Cassini Division was named after him. -
Sir Isacc Newton
Isaac Newton made many discoveries in multiple fields of science, including the discoveries of gravitational force and the three universal laws of motion. -
William Heschel
He was the founder of sidereal astronomy for observing the heavenly bodies. -
Percival Lowell
He was a businessman, author, mathematician, and astronomer who fueled speculation that there were canals on Mars. -
Ejnar Hertzsprung
He was a Danish chemist and astronomer born in Copenhagen. Together with Henry Norris Russell, he developed the Hertzsprung–Russell diagram. -
Albert Einstein
He used Planck's quantum hypothesis to describe the electromagnetic radiation of light. Einstein's second 1905 paper proposed what is today called the special theory of relativity. -
Edwin Hubble
He played a crucial role in establishing the fields of extragalactic astronomy and observational cosmology and is regarded as one of the most important astronomers of all time. -
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. -
John Glenn
He was a United States Marine Corps aviator, engineer, astronaut, businessman, and politician. He was the first American to orbit the Earth, circling it three times in 1962. -
Neil Armstrong
He was the first person to walk on the moon. -
Sputnik
The Sputnik rocket was an unmanned orbital carrier rocket designed by Sergei Korolev in the Soviet Union, derived from the R-7 Semyorka ICBM. On 4 October 1957, it was used to perform the world's first satellite launch, placing Sputnik 1 into a low Earth orbit. -
Yuri Gargin
The first man to fly in space -
The Apollo Space Program
The shuttle that first put people on the moon. -
First Space Shuttle Flight
The first flight of the space shuttle program. -
Mars Pathfinder Expadition
It was an American spacecraft that landed a base station with a roving probe on Mars in 1997 -
Cassini Orbiter
This was sent to study Saturn and arrived there in 2004. -
Difference between refracting and reflecting telescopes
A reflecting telescope is an optical telescope which uses a single or combination of curved mirrors that reflect light and form an image. A refracting telescope is a type of optical telescope that uses a lens as its objective to form an image. -
Current Space Event
The moon is in a deep freeze just like the Mid West and the North East. Temperatures were down yo -310 Degrees F
