My Project is about….. Introduction The Sun is one out of billions of stars, it is the closest star to Earth. The Sun rotates once every 27 days, it is.

My Project is about….My Project is about….

IntroductionIntroduction

The Sun is one out of billions of stars, it is The Sun is one out of billions of stars, it is the closest star to Earth. The Sun rotates the closest star to Earth. The Sun rotates once every 27 days, it is now a middle-once every 27 days, it is now a middle-aged star. The Sun formed over four and aged star. The Sun formed over four and a half billion years ago (according to a half billion years ago (according to scientists). You may think the Sun will die scientists). You may think the Sun will die soon, but it will keep shining for at least soon, but it will keep shining for at least another five billion years. another five billion years.

What is the Sun made up of?What is the Sun made up of?

The Sun is mostly hydrogen and heliumThe Sun is mostly hydrogen and helium If you could take apart the Sun and pile up its If you could take apart the Sun and pile up its

different elements, you’d find that 74% of its different elements, you’d find that 74% of its mass comes from hydrogen. with 24% helium. mass comes from hydrogen. with 24% helium. The remaining 2% is includes trace amounts of The remaining 2% is includes trace amounts of iron, nickel, oxygen, and all the other elements iron, nickel, oxygen, and all the other elements we have in the Solar System. In other words, the we have in the Solar System. In other words, the Solar System is mostly made of hydrogen.Solar System is mostly made of hydrogen.

SizeSize

The Sun’s diameter is about 870,000 miles The Sun’s diameter is about 870,000 miles wide. It is 109 times wider than Earth, and wide. It is 109 times wider than Earth, and is 333,000 times heavier. Over one million is 333,000 times heavier. Over one million Earths could fit inside the Sun. You could Earths could fit inside the Sun. You could flatten out 11,990 Earths to cover the flatten out 11,990 Earths to cover the surface of the Sunsurface of the Sun

The Sun is about The Sun is about 1,989,000,000,000,000,000,000,000,000,01,989,000,000,000,000,000,000,000,000,000 kilograms!00 kilograms!

There are some much bigger stars out There are some much bigger stars out there, for example…there, for example…

TemperatureTemperature

The Sun’s surface is called the The Sun’s surface is called the photosphere. The temperature of the photosphere. The temperature of the photosphere is about 10,000° Fahrenheit photosphere is about 10,000° Fahrenheit (5537.7 degrees Celsius). The (5537.7 degrees Celsius). The temperature at the core, of the Sun, is temperature at the core, of the Sun, is about 27 million° Fahrenheit (15 million about 27 million° Fahrenheit (15 million degrees Celsius). That’s pretty hot! degrees Celsius). That’s pretty hot!

HistoryHistory

In ancient times, the people believed the In ancient times, the people believed the Sun was a burning ball of fire created by Sun was a burning ball of fire created by the gods. Later, people thought it was a the gods. Later, people thought it was a solid object, or a liquid ball.solid object, or a liquid ball.

What would happen if we didn’t What would happen if we didn’t have the Sun?have the Sun?

Without the Sun, Earth could not Without the Sun, Earth could not support life. The Sun gives off support life. The Sun gives off heat and light that the Earth heat and light that the Earth needs to support life.needs to support life.

How far away is the Sun?How far away is the Sun?

If you could take a journey in an normal If you could take a journey in an normal airliner flying at its normal speed (about airliner flying at its normal speed (about 644 km an hour) travelling from Earth to 644 km an hour) travelling from Earth to the Sun, it would take 20 years to reach the Sun, it would take 20 years to reach your destination, and that's without your destination, and that's without stopping.stopping.

FactsFacts

The official definition of a star like The Sun is a The official definition of a star like The Sun is a "Yellow G2 Dwarf." "Yellow G2 Dwarf."

Light from the Sun takes 8 minutes to reach Light from the Sun takes 8 minutes to reach Earth, 40 minutes to reach Jupiter and 7 hours Earth, 40 minutes to reach Jupiter and 7 hours to reach the edge of the Solar System.to reach the edge of the Solar System.

In the same way that the planets orbit around In the same way that the planets orbit around the Sun, the Sun orbits around the centre of the the Sun, the Sun orbits around the centre of the Milky Way galaxy, taking 225,000,000 years to Milky Way galaxy, taking 225,000,000 years to complete a full orbit, travelling at 800,000 complete a full orbit, travelling at 800,000 kilometres per hour.kilometres per hour.