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# Harry Kroto 2004

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. Harry Kroto 2004. So the Universe is BIG and all our information about it has been obtained by analysing the light received from space

## Harry Kroto 2004

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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 Harry Kroto 2004

2. 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 Harry Kroto 2004

3. We can only see about 1/6 (ca 6000ly) of the way to the Galctic Centre due to scattering by gas and dust in the disk

4. 365 x 24 x 60 x 60 = 0.36 x 2.4 x 0.36 x 102 x 10x 104 = 3x107 sec in a year Harry Kroto 2004

5. 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 Harry Kroto 2004

6. 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 Harry Kroto 2004

7. 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 Harry Kroto 2004

8. 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

9. The Structure of the Universe – dimensions ly 108 1010 108 Clusters of Galaxies 102 – 103 Galaxies in a cluster 1011 Stars in a Galaxy on average 1022 Stars in total 50% Stars 50% Interstellar Matter Harry Kroto 2004

10. Summary Harry Kroto 2004

11. 2000 Galaxies in Virgo Harry Kroto 2004

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13. 106 Local Group of Galaxies 27 in the cluster Andromeda nearest is 2x106 ly away Harry Kroto 2004

14. Spiral Density Waves Lindblad Lin-Shu Theory Harry Kroto 2004

15. 103 104 105 Galaxy contains 1011 Stars Interstellar Medium: 90% H 8% He 2% rest 1% grains (by atoms) 1 rev in 200x106 yrs Harry Kroto 2004

16. Spiral Galaxy - Canis Venitici Harry Kroto 004

17. Rosette Nebula Harry Kroto 2004

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19. Emission Nebulae main processes Harry Kroto 2004

20. View towards the Galactic Centre Harry Kroto 2004

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