Science

• Sun: a luminous ball of gases (made up of helium and hydrogen)

  • It's the nearest star to our planet
  • The largest object in our solar system
• Size: 695 500 kg (333 times as massive as the Earth)
• Mass: 1.988 x 10^30 kg
• Brightness: 3.9 x 10^26 W
• Temperature: 5778 kelvin and about 27 million Fahrenheit (15 million degree Celsius)
• Hottest color of the sun is BLUE
• Coolest color of the sun is RED
• Hertzsprung-Russell diagram: A diagram that shows the temperature of a star against its luminosity.
• Life Cycle of the stars

  • Nebula
  • Protostar
  • Main sequence star
  • Red giant
  • Planetary Nebula
  • White dwarf
  • Black dwarf
• A massive star usually explodes into a supernova explosion
• Nebula Star is born if the remnants of this explosion is 1.4 to 3 times as massive as our sun
• Blackhole attracts any matter that comes close to it
• Types of stars

  • O
  • B
  • A
  • F
  • G
  • K
  • M
• Temperature of the stars

  O - over 25 000k

  B - 11 000k to 25 000k

  A - 7 500k to 11 000k

  F - 6 000k to 7 500k

  G - 5 000k to 6 000k

  K - 3 500k to 5 000k

  M - below 3 500k
• Colors of the stars

  • Blue
  • Blue
  • Blue
  • Blue to white
  • White to orange
  • Orange to red
  • Red
• Nuclear fusion is the process that converts hydrogen in the core of a main sequence star into helium