The Universe

The Universe

24/03/22

Multiple Choice

What is the name of our galaxy

• The Milky Way

• Andromeda

• Proxima Centauri

• Snickers

Multiple Choice

Which of these are uses for satellites

• Communication

• Navigation

• Weather

• All of them

Multiple Choice

Which force holds the Earth in Orbit

• Friction

• Normal Force

• Repulsion

• Gravity

Multiple Choice

Which of these causes a day?

• The time it takes the moon to orbit the Earth

• The time it takes the sun to orbit the Earth

• The time it takes the Earth to orbit the sun

• The time it takes the Earth to go one revolution

  (spin once)

...Recap where we left off

How big is big?

Galaxies are big...

... ours, the milky way, contains 200 billion stars

Or more!

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It also contains loads of dust and gas

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It's 120,000 light years across

If we looked at a star on the other side of the galaxy, how old would the light we were looking at be?

Early humans...

were discovering writing,

​

had started cooking on fires in their homes,

​

still mainly lived in caves​

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That's 700 000 000 000 000 000 miles - even the Proclaimers would give up!

120,000 years

The Universe...

...

The Universe is literally everything that exists.

​

All of space and time and everything they contain!

​

Most of what we see is organized into galaxies.

What's a galaxy?

Answers in books!

200 billion stars is a lot, so how do you think we count that?