Solar System Timeline

Timeline created by ericblohm
  • 150

    Ptolemy

    Ptolemy
    Ptolemy is the creator of the geocentric belief, which puts Earth at the center of the universe.
  • Period:
    Feb 19, 1473
    to
    May 24, 1543

    Nicolaus Copernicus

    Nicolaus Copernicus was the first person to develop a coprehensive heliocentric model of the solar system. Heliocentric means revolving around the sun.
  • Period:
    Feb 15, 1564
    to

    Galileo Galilei

    Galileo Galilei supported Nicolaus Copernicus' heliocentric model. He publicly supported Copernicus at a time where a geocentric view was far more common.
  • Period:
    Dec 27, 1571
    to

    Johannes Kepler

    Kepler was the person who discovered that Gravity and Inertia were the two factors that kept all the planets in orbit.
  • Period: to

    Sir Isaac Newton

    Sir Isaac Newton built the first reflecting telescope. He also discovered that the planets orbit the sun because of the gravitational pull.
  • Uranus

    Uranus
    Discovered by William Herschel, Uranus is the third largest planet in our solar system. It is a gas giant with a 51,200 km diameter. At its aphelion it is 3 billion km away from the sun.
  • Ceres

    Ceres
    Ceres is the biggest asteroid in our solar system The difference between asteroids and comets is that asteroids are made of metal and rock while comets are made of rock, ice, and dust. The difference between a comet and a meteoroid is that a meteoroid orbits the sun while a comet does not.
  • Neptune

    Neptune
    Neptune is a gas giant with a diameter of 49,500 km. At its aphelion it is over 4.5 billion km away from the sun.
  • Hoba

    Hoba
    Hoba is the largest meteor ever discovered. It was discovered when a farmer was plowing a field and his plow stopped. it weighs 66 tons. The difference between a meteor, a comet, and an asteroid is that a meteor orbits the sun.
  • Pluto Discovered

    Pluto Discovered
    Pluto differs from the othe outer planets because it is not a true planet, it is a dwarf planet. It is a dwarf planet because it is far smaller than all the other planets
  • Halley's Comet - 239 B.C.

    Halley's Comet - 239 B.C.
    Halley's comet was the first comet ever discovered, and is visible on Earth every 75 to 76 years.
  • Pluto named a dwarf planet

    Pluto named a dwarf planet
    Pluto, which was before thought of as a regular planet, is designated a dwarf planet
  • Gas Giant

    Gas Giant
    Gas giants are planets that are not composed of rock or other solid materials. The gas giants in our solar system are Jupiter, Saturn, Uranus, and Neptune.
  • Terrestrial Planets

    Terrestrial Planets
    A terrestrial planet is a planet that is primarily composed of silicate rocks and metals. Mercury, Mars, Venus, and Earth are Terrestrial planets.
  • Mercury

    Mercury
    Mercury is the smallest planet not including Pluto. It is a terrestrial planet. Its diameter is 4,878 km and at the point in its orbit farthest away from the sun it is about 70 million km from the sun.
  • Venus

    Venus
    Venus is the third smallest planet excluding Pluto. Venus is a gas giant with a diameter of 12,104 km. At its point in its orbit farthest away from the Sun it is 109 million km away.
  • Mars

    Mars
    Mars is the second smallest planet excluding Pluto, a terrestrial planet with a 6,794 km diameter. At its point farthest away from the sun it is 249 million km away.
  • Earth

    Earth
    Earth is a terrestrial planet with a diameter of 12,756 km. At the point farthest away from sun (the aphelion) it is nearly 153 million km away from the sun.
  • Saturn

    Saturn
    Saturn, a gas giant, is the second biggest planet in our Solar System. It has a diameter of 120,540, and at its aphelion it is 1.5 billion km away from the sun.
  • Jupiter

    Jupiter
    Jupiter, a gas giant, is the biggest planet in our solar system. It has a diameter of 142,800 km, which is over 11 times larger than Earth's. At its aphelion it is over 815 million km away form the sun.