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Form 3 PMR Science Chapter 9 Stars and Galaxies

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Form 3 PMR Science Chapter 9 Stars and Galaxies

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Form 3 PMR Science Chapter 9 Stars and Galaxies

  1. 1. Class Colour Surface Example TemperatureO Blue > 25 000 SpicaB Whitish-blue 11 000 – 25 000 RigelA White 7 500 – 11 000 SiriusF Yellowish-white 6000 – 7500 ProcyonAG Yellow 5000 – 6000 The SunK Orange 3500 – 5000 ActurusM Red < 3500 Betelgeuse
  2. 2.  Neutron star White dwarf The Sun Giant Supergiant
  3. 3. Star Distance (Light Years)Sirius 9Canopus 98Alpha Centauri 4.3Acturus 36Vega 26Capella 45Rigel 900Procyon 11Achernar 118Beta Centauri 490 In order of brightness ….
  4. 4. Nebulae pulled Gravitational Huge Clouds of inwards Nebulae Pull between Gases and Dust towards the particles core Coretemperature & Gravitational Start to spin Core compact Pressure force increases increasesNuclear fusionstarts (15 000 Start to shine degrees)
  5. 5.  Death of Medium-sized star  Red giant >> White Dwarf >> Black dwarf Death of Large star  Red giant >> Supergiant >> Supernova >> Neutron star Death of Super-Large star  Red giant >> Supergiant >> Supernova >> Black hole
  6. 6.  Furthest galaxy – 10 000 million years apart Universe begin about 18 000 million years ago as a result of a very huge explosion Scatter cosmic materials and hot gases in all directions Scientists believe that the Universe is still expanding and also breaking up

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