Sci9

• star - object that heat and light the planets
• Distance - measured in light years, and is a ray of light that travel in one yr it is about 6 trillion miles.
• Magnitude brightness - measure of the brightness of celestial obj.
• Apparent magnitude - how bright a star appear on earth.
• Absolute magnitude - how bright the star actually is.
• Temp & Color - indicates the ”T” of the star and it is classified as “T”
• Main Sequence stars - major grouping of stars that forms a narrow bond from upper left to the lower right when plotted accdg to luminosity of the surface temp on the - Hertzsprung Russel Diagram.
• Classification of stars

  • O - 20k - 60k Blue
  • B - 10k - 30k Blue-white
  • A - 7.5k - 10k White
  • F - 6k - 7.5k Yellow-white
  • G - 5k - 6k Yellow
  • K - 3.5k - 5k orange
  • M - 2k - 3.5k - red
• Life cycle of a star

  Protostar - average star - red giant - planetary nebula - white dwarf
• Life cycle of a star

  Protostar - massive star - red supergiant - supernova - neutron star or blackhole
• nebula - they begin their lives as clouds of dust and gas.
• Sun - primary star
• Uy scuti - biggest star
• Betelgeuse - next supernova
• Vega - zero star
• Polaris - north star
• Sirius - brightness night star
• Proxima centuri - star next door
• Pleiodes seven sky maiden
• Canopus- handsome star
• Arcturus- brightness star of north
• Deneb - blue-white supergiant
• La superba - carbon star
• Pollux & castor - twins
• Antares - red ruby giant
• Black widow pulsar - fattest collapsed star
• Messter 60 - supermassive blackhole in duoff galaxy
• Sagittarius A - blackhole in the heart of milky way
• constellation - group of stars that form a patter in the sky.
• There are 80 total of constellation
• Seven manor constellation

  • Cassiopeia
  • cygnus
  • scorpius
  • draco
  • orion
  • ursa major
  • ursa minor
• The 12 zodiac signs

  • Aries
  • taurus
  • gemini
  • cancer
  • leo
  • virgo
  • libra
  • scorpio
  • sagiittarius
  • capricorn
  • aquarius
  • pisces
• Cassiopeia - the queen
• Cygnus - the swan
• Scorpius - the scorpion
• Orion - the hunter
• ursa major - big bear
• Ursa Minor - little bear
• Draco - the dragon
• Momentum - an object is the product of its mass and velocity