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**S1 Science Planet Earth topic**

Where are we? S1 Science Planet Earth topic

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**the sun and all the celestial bodies which orbit the sun.**

a self-luminous celestial body consisting of a mass of gas held together by its own gravity in which energy is generated by nuclear reactions. Planet Galaxy the sun and all the celestial bodies which orbit the sun. Moon made up of billions of different “solar systems”. Solar System made up of billions of different galaxies. Star Match up using pen tool a sphere of rock and/or gas which orbits a star. Universe a sphere of rock and/or gas which orbits a planet.

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**Learning outcomes Success criteria**

Understand the place of the Earth in the Universe in terms of how big the Universe is. State how long it would take us to reach each of the following in a rocket as fast as we have ever built: Neptune Our next nearest star (after the sun) State at what speed light travels in kilometres per hour. State how long it would take us to reach each of the following travelling at the speed of light: Explain what is meant by a “light year”. State how many light years away: Our nearest star is Andromeda is 1 2 3 4 5

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**To get to Neptune at the speed of light 25 000 years**

Distance to Andromeda To get to Proxima Centauri by rocket 4.2 years To get to Proxima Centauri at the speed of light km/h 2.5 million light years The speed of light 4.2 light years To get to Neptune by rocket 4 hours Distance to Proxima Centauri The fastest rocket we have ever built km/h

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**10 800 000 000 km/h To get to Neptune at the speed of light**

years 12 years Distance to Andromeda To get to Proxima Centauri by rocket 4.2 years To get to Proxima Centauri at the speed of light km/h 2.5 million light years The speed of light 4.2 light years To get to Neptune by rocket 4 hours Distance to Proxima Centauri The fastest rocket we have ever built km/h

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**Draw a diagram to show the relationship between:**

Stars Planets Moons Galaxies The Universe

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**Learning outcomes Success criteria**

Understand the place of the Earth in the Universe in terms of how big the Universe is. State how long it would take us to reach each of the following in a rocket as fast as we have ever built: Neptune Our next nearest star (after the sun) State at what speed light travels in kilometres per hour. State how long it would take us to reach each of the following travelling at the speed of light: Explain what is meant by a “light year”. State how many light years away: Our nearest star is Andromeda is 1 2 3 4 5

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A few definitions Light year (ly): Distance light travels in one years (about 10 trillion km) Andromeda Galaxy – 2.4 million light years away.

A few definitions Light year (ly): Distance light travels in one years (about 10 trillion km) Andromeda Galaxy – 2.4 million light years away.

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