Jenovai History of Astronomy

  • 384 BCE

    Aristotle

    Aristotle
    Aristotle was known for his belief in a geocentric universe. A geocentric universe is one that represents Earth in the middle and all the planets orbiting around Earth. He also believed that all the stars and planets were spheres except Earth. Aristotle was born in 384 and died in 322. In 335 Aristotle founded his own school in Athens where he spent most of his life studying, teaching, and writing.
  • 100

    Ptolemy

    Ptolemy
    Ptolemy is known for being a mathematician. A mathematician is a expert in mathematics. He was born in 100 and died in 168. The Ptolemaic system is a geocentric cosmology. A geocentric cosmology is one that represents Earth in the center and all the planets orbiting around Earth.
  • 1473

    Copernicus

    Copernicus
    Copernicus was born in 1473 and died in 1543. In the early 1500s when everyone believed Earth was the center of the universe, Copernicus proposed that the planets revolved around the Sun. Copernicus's model of the universe was known as the heliocentric universe.
  • 1564

    Tycho Brahe

    Tycho Brahe
    Tycho was born in 1546 and died in 1601. He was known for turning around the belief of the people that we lived in a geocentric universe. He was a Danish nobleman and astronomer. His work involved developing astronomical instruments like the telescope. He also measured and fixed the positions of the stars for future discoveries. He created more than 777 fixed positions for stars.
  • 1564

    Galileo

    Galileo
    Galileo was born in 1564 and died in 1642. He was a Italian astronomer. Galileo invented another version of the telescope and was a supporter of the Copernican theory. The Copernican theory supports that the Sun is motionless in the center of the universe and all the other planets are orbiting around the Sun.
  • 1570

    Hans Lippershey

    Hans Lippershey
    Hans was born in 1570 and died in 1619. Hans invented the kijker. It was also known as the looker. The looker was an instrument that had two lenses held in place so that an observer could look through at distant objects.
  • 1571

    Johannes Kepler

    Johannes Kepler
    Johannes Kepler was born in 1571 and died in 1630. Johannes is best known for his laws of planetary motion.
  • Giovanni Cassini

    Giovanni Cassini
    Giovanni was born in 1625 and died in 1712. He was a astronomer.
  • Sir Isaac Newton

    Sir Isaac Newton
    Newton was born in 1643 and died in 1724. Newton worked on universal gravitation also known as gravity. Newton also developed the three laws of motion. The first law states that an object will remain at rest until it is struck with a certain amount of force.
  • William Herschel

    William Herschel
    William was born in 1738 and died in 1822. William was an astronomer that was widely known for being the founder of sidereal astronomy. Sidereal astronomy helps astronomers keep time and know where to point their telescopes without having to know where the Earth was in its orbit.
  • Percival Lowell

    Percival Lowell
    Lowell was born in 1855 and died in 1916. Lowell is best known for his belief that there as life on Mars. He also founded the Lowell Observatory in Flagstaff.
  • Ejnar Hertzsprung

    Ejnar Hertzsprung
    Ejnar was born in 1873 and died in 1967. Ejnar became a chemical engineer.
  • Albert Einstein

    Albert Einstein
    Albert was born in 1879 and died in 1955. In 1921 he won the nobel prize for physics for his explanation of the photoelectric effect. The photoelectric effect is
  • Edwin Hubble

    Edwin Hubble
    Edwin was born in 1889 and died in 1953. Edwin discovered cosmology. Cosmology is the science of the origin and development of the universe.
  • Karl Jansky

    Karl Jansky
    Karl was born in 1905 and died 1950. Karl investigated the sources of static that might interfere with radio transmission.
  • John Glenn

    John Glenn
    John was born in 1921 and died in 2016. John was chosen to be apart of the newly formed NASA program. John was the first American to fully orbit around the Earth.
  • Neil Armstrong

    Neil Armstrong
    Neil was born in 1930 and died in 2012. Neil was the first human to walk on the Moon.
  • Yuri Gagarin

    Yuri Gagarin
    Yuri was the first person to fly in space. His flight lasted 108 minutes while he orbited around the Earth.
  • Sputnik

    Sputnik
    The Sputnik was the first satellite launched into space man. The satellite fell back to Earth in 1958.
  • The Apollo Program

    The Apollo Program
    The Apollo Program started in 1963 and ended in 1972. The program was designed to safely land and bring back humans from the Moon. 6 out of 17 of these missions were accomplished.
  • The First Space Shuttle Flight

    The First Space Shuttle Flight
    NASA launched the first space shuttle into orbit in 1981.
  • Mars Pathfinder Expedition

    Mars Pathfinder Expedition
    The expedition was launched in 1996. It landed on Mars Ares Vallis in 1997.
  • Cassini Orbiter

    Cassini Orbiter
    The spacecraft was capable of taking accurate measurements and detailed images. It was launched in 1997.
  • The difference between refracting and reflecting telescopes

    The difference between refracting and reflecting telescopes
    A refractor telescope uses two lenses where on the other hand a refletor telescope uses two mirrors.
  • Voyager 1

    Voyager 1
    The Voyager 1 was the first aircraft to reach interstellar space. Interstellar space is the place in space where the Sun's constant flow of material and magnetic field stops affecting its surroundings.