timelines

By Jordnan2005
  • 1967 BCE

    Enjnar Hertzsprung

    one of the inventors of the Hertzsprung Rusell diagram. The HR diagram shows the correlation between tempature absoulote magnitude and brightness and the spectral type of star.
  • 1955 BCE

    albert Einstin

    Theory of Relativity 1905 and gravitation.
  • 1953 BCE

    Edwin Hubble

    using the color of the stars discovered the universe is expanding. Hubbles Law galaxies are moving away from each other. The idea is the basis of the Bing Bang Theory of how the universe began.
  • 1916 BCE

    Percival lowell

    Discovered the planet pluto and studied the canalis on Mars. Built the lowell observotory in Flagstaff AZ to study Mars.
  • 1822 BCE

    William Herschel

    Discovered the planet Uranus and its moons. He also discovered 2 more of Saturns moons. Believed to have found polar ice on Mars leading to the studies hoping to find water on Mars.
  • 1724 BCE

    Sir issac Newton

    Further developed works of Copernicus and Kepler using math. invented reflecting telescope.
  • 1712 BCE

    Gioanni Cassini

    italian who discovered the division of the rings of saturn. 4 of saturns moons and the rotation periods of Mars and jupiter. Cassini space mission to saturn named after him.
  • 1642 BCE

    Galieo

    used a refracting telescope to prove not all things revolve around the Earth. Disproving the Ptolemaic or geocentric model and making the heliocentric model more accepted although not without controversy. He also discovered suns spots the 1st four moons of jupiter the diffrent features of the moon and discovered that Venus goes through phases similar to the moon.
  • 1630 BCE

    Johannes Kepler

    Tycho Brahes assistant. Discovered that the orbit of the planets are not circular but elliptical.
  • 1619 BCE

    Hans lippershey

    was a lens maker from Germany but moved to the Netherlands. Believed to be the first to apply for a patent for the telescope desighn of 3x magnification.
  • 1601 BCE

    Tycho

    spent 20 years of his life taking the most precise measurements within 2 arc minutes of the movements of the stars and planets.
  • 1543 BCE

    copernicus

    Read ptomelys Almagest and proposed copernicus heliocentricism. The Sun is the center of the universe with the planets rotating around it. Even though it was proposed by Aristarchus 1750 years before.
  • 323 BCE

    aristotle

    proved earth is spherical but also believed in a geocentric model in witch the sun, other planets and the stars were a part of other spherical shells that surrounded and revolved around the Earth.
  • 168 BCE

    ptomely

    wrote almagest a set of astronomy manuals whitch catalouges the stars, eclisps the movement of the sun and moon. His model is the geocentric theory and also called the ptomelic Model. he relied Hipparchus astronomy work for the star catalog