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

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