1. So the Universe is BIG and all our knowledge has been obtained by analysing the light from space

2. It has come at the speed of light
So the Universe is BIG and all our knowledge has been obtained by analysing the light from space
It has come at the speed of light
3x1010 cm s-1 = 3x105 km s-1 = 300,000 km per sec

3. It has come at the speed of light
So the Universe is BIG and all our knowledge has been obtained by analysing the light from space
It has come at the speed of light
3x1010 cm s-1 = 3x105 km s-1 = 300,000 km per sec
30 million seconds in a year

4. It has come at the speed of light
So the Universe is BIG and all our knowledge has been obtained by analysing the light from space
It has come at the speed of light
3x1010 cm s-1 = 3x105 km s-1 = 300,000 km per sec
30 million seconds in a year
1 light year (ly) = 1013 km = ten million million km

5. It has come at the speed of light
So the Universe is BIG and all our knowledge has been obtained by analysing the light from space
It has come at the speed of light
3x1010 cm s-1 = 3x105 km s-1 = 300,000 km per sec
30 million seconds in a year
1 light year (ly) = 1013 km = ten million million km
Orbit of Pluto is about 1/000 ly

6. It has come at the speed of light
So the Universe is BIG and all our knowledge has been obtained by analysing the light from space
It has come at the speed of light
3x1010 cm s-1 = 3x105 km s-1 = 300,000 km per sec
30 million seconds in a year
1 light year (ly) = 1013 km = ten million million km
Orbit of Pluto is about 1/000 ly
Orbit of the Earth ca 1/100,000 ly

7. Harry Kroto 2004

8. It has come at the speed of light 3x1010 cm s-1 = 3x105 km s-1
So the Universe is BIG and all our information about it has been obtained by analysing the light received from space
It has come at the speed of light
3x1010 cm s-1 = 3x105 km s-1
3x107 sec in a year
1ly = 1013 km = 1018cm
Orbit of Pluto about 10-3 ly
Orbit of the earth ca 10-5 ly
Harry Kroto 2004