physics

• edwin hubble - proposed the big bang theory
• universe - summation of all existing matter and space
• nebula - gas cloud
• galaxy - basic unit of universe
• 3 hubble classification system:

  1. spiral galaxies
  2. elliptical galaxies
  3. irregular galaxies
• spiral galaxies - halo arm structure
• elliptical galaxies - most abundant galaxies
• irregular galaxies - no particular shape or symmetrical structure
• irregular galaxies - smallest galaxies
• star - ball of gases drawn together by gravity
• 8 the life of the stars:

  1. nebula
  2. protostar
  3. red giant
  4. dwarf
  5. red super giant
  6. super nova
  7. neutron star
  8. black hole
• nebula - interstellar cloud of dust, hydrogen, and helium
• protostar - glowing ball of gas
• red giant - most of the hydrogen atoms are converted to helium
• dwarf - white and black dwarf
• red supergiant - star steadily shines
• supernova - star's core collapses causing an explosion
• neutron star - gravitational collapse of a massive star's core
• black hole - remains of the supernova explosion
• 9 planets:

  1. mercury
  2. venus
  3. earth
  4. mars
  5. jupiter
  6. saturn
  7. uranus
  8. neptune
  9. pluto
• mercury - smallest planet
• mercury - fastest revolving planet
• venus - morning and evening star
• mercury - roman god of commerce, travel, and thievery
• venus - roman god of love and beauty
• earth - recognized where the life exist
• mars - red planet
• mars - roman god of war
• jupiter - biggest and largest planet
• jupiter - god of roman mythology
• jupiter - gas giant planet, great red spot
• saturn - planet that has bright and colorful ring
• uranus - axis rotation tilted sideways
• neptune - coldest planet
• neptune - roman god of sea
• pluto - 9th planet and considered as region
• pluto - roman god of the underworld
• mass - amount of matter