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4 January, 13:04

How has the knowledge and perception of the universe changed over the past century?

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  1. 4 January, 15:05
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    Our understanding of the universe has changed a lot over time!

    Ptolemy

    He improved on Aristotle's theory which was that the earth was the center of the universe also known as geocentric.

    Nicolaus Copernicus

    Copernicus had a theory that the sun was the center of our solar system. This is also known as heliocentric.

    Tycho Brahe

    His work supported the idea that the Earth orbited the sun.

    Brahe hired Kepler, another astronomer to work with him.

    How has our understanding of the universe changed over time?

    Aristotle

    Johannes Kepler

    Galileo

    Isaac Newton

    Edmund Halley

    Edwin Hubble

    By Isamilla & Nelleke

    The Hubble space telescope was named after Edwin Hubble.

    He had three laws of motion.

    He hypothosized that the nebulae were their own galaxies.

    He imagined the earth at the

    center of the universe with the sun, the moon, the stars and the planets orbiting it in perfect circles.

    Newton put Kepler and Galileo's ideas together and discovered that the reason that things fall on the ground is the same reason that planets orbit around the sun.

    He made a telescope that could magnify

    up to 30 times.

    He discovered that Copernicus' theory

    was true. "We're not the center of the universe."

    He found out that the planets orbit the

    sun in ellipses (oval shapes).

    He explained how the tides were made by the moon.

    He figured out that the speed of the planets depend on the sun.

    Halley discovered a comet. It was discovered in 1705. It will come around again in 2061

    The comet Halley comes every 75 - 76 years

    384-322 BCE

    90 AD - 168 AD

    1473 - 1543

    1546 - 1601

    1571 - 1630

    1564 - 1642

    1642 - 1727

    1656 - 1742

    1889 - 1953

    Celestial Sphere

    It's an invisible sphere around the earth
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