The Discovery of the Universe

Last year, people thought that a flat earth was supported by pillars

• False

• True

By 300 BC, most people in Europe thought the earth was a sphere, but the flat-earth idea in India continued until about 1600.

• False

• True

Scientist use evidence from observations and measurement to develop explanations. They use the explanation to make predictions about what will happen in the future.

• False

• True

Models help us to explain what we see and to predict what will happen.

• False

• True

In this model, the Sun, moon, planets and stars moved around the earth .

They moved on crystal sphere that light could travel.

• Heliocentric Model

• Geocentric Model

A Vietnamese Mathematician and astronomer called Bhaskaracharya said that there was force between all objects. This force is what we call gravity.

• True

• False

Astronomers used Newton's equations to predict that there was a planet beyond Uranus.

• True

• False

Greek Aristarchus described a different model in around 200 BC called geocentric model

• True

• False

In 1534, Nicolaus Copernicus published a book about the heliocentric model.

• True

• False

Galileo Galilei used a new technology called microscope to see the universe.

• True

• False

Answer explanation

Galileo Galilei was an Italian physicist.

In 1609, he used a new invention called a telescope.

He saw objects in orbit around Jupiter, not in orbit around the Earth.

They were moons of Jupiter, and they are called GALILEAN SATELLITES after him.

Galilei's observation provided new evidence for the heliocentric model.