The universe

Around 200 billion stars

How many stars are there in the Milky Way?

The " Big Bang " created the universe

How was the universe created?

1- Stars 2- Dust 3- Gases

What are galaxies made up of?

1- Habitable zone ( planet needs to be located within equal distance from the sun ) 2- Circular orbit ( allowing us to receive warmth and weather changes ) 3- Energy ( development of life on Earth ) 4- Ideal mass ( determines the strength of gravity on the planet ) 5- Water ( liquid form : essential for living things ) 6- Lithosphere ( allows complex organisms to evolve )

What are the six conditions for life on Earth?

It is a unit of measure equivalent to the distance that light can travel in a space within a year ( outside the solar system )

What is a light year?

It is the distance between the Earth and the sun ( inside the solar system )

What is an astronomical unit?

1- Planets 2- Stars 3- Gas / dust 4- Black holes 5- Radiation

What is in the universe?

All of the energy and matter in the universe was contained in an atom and after an explosion occurred, the energy was released by forming galaxies that continued to expand

What is the " Big Bang " ?

1- Hydrogen 2- Helium 3- Oxygen 4- Carbon

What is the universe composed of?

It is made up of empty space

What is the universe made up of?