Cosmology & Astronomy Tutor

• Scale
  • Scale of the large
  • Scale of the small
  • Scale of earth and sun
  • Scale of earth and sun
  • Scale of distance to closest stars
  • Scale of the galaxy
  • Intergalactic scale
  • Hubble image of galaxies
• Time scale of the cosmos
  • Cosmological time scale 1
  • Cosmological time scale 2
• Light and fundamental forces
  • Introduction to light
  • Four fundamental forces
• Big bang and expansion of the universe
  • Big bang introduction
  • Radius of observable universe
  • Radius of observable universe (correction)
  • Cosmic background radiation
  • Cosmic background radiation 2
  • Red shift

• Life and death of stars
  Birth of stars
  • Accreting mass due to gravity simulation
  • Becoming a red giant
  • White and black dwarfs
  • Star field and nebula images
  • Lifecycle of massive stars
  • Supernova (supernovae)
  • Supernova clarification
  • Black holes
  • Supermassive black holes
• Quasars and galactic collisions
  • Quasars
  • Quasar correction
  • Galactic collisions
• Stellar parallax
  • Parallax in observing stars
  • Stellar parallax
  • Stellar distance using parallax
  • Stellar parallax clarification
  • Parsec definition
• Cepheid variables
  • Cepheid variables 1
  • Why cepheids pulsate
  • Why gravity gets so strong near dense objects

• Plate tectonics
  • Plate tectonics: Difference between crust and lithosphere
  • Structure of the earth
  • Plate tectonics: Evidence of plate movement
  • Plate tectonics: Geological features of divergent plate boundaries
  • Plate tectonics: Geological features of convergent plate boundaries
  • Plates moving due to convection in mantle
  • Hawaiian islands formation
  • Pangaea
  • Compositional and mechanical layers of the earth
  • How we know about the earth's core
• Seismic waves and how we know earth's structure
  • Seismic waves
  • Why S-waves only travel in solids
  • Refraction of seismic waves
  • The mohorovicic seismic discontinuity
• Earth's rotation and tilt
  • Seasons aren't dictated by closeness to sun
  • How Earth's tilt causes seasons
  • Are southern hemisphere seasons more severe?
  • Milankovitch cycles precession and obliquity
  • Precession causing perihelion to happen later
  • What causes precession and other orbital changes
  • Apsidal precession (perihelion precession) and Milankovitch cycles
• Moon phases and eclipses
  • The Moon
  • Solar and lunar eclipses

• History of life on earth
  • Earth formation
  • Beginnings of life
  • Ozone layer and eukaryotes show up in the Proterozoic eon
  • Biodiversity flourishes in Phanerozoic eon
  • First living things on land clarification
• Humanity on earth
  • Human evolution overview
  • Understanding calendar notation
  • Correction calendar notation
  • Development of agriculture and writing
  • Firestick farming in early Australia
  • Collective learning
  • Agriculture and human population
  • Thomas Malthus and population growth in 1798
  • Energy inputs for tilling a hectare of land
  • Random predictions for 2060
• Measuring age on earth
  • Chronometric revolution
  • Carbon 14 dating 1
  • Carbon 14 dating 2
  • Potassium-argon (K-Ar) dating
  • K-Ar dating calculation
• Life in the universe
  • Detectable civilizations in our galaxy 1
  • Detectable civilizations in our galaxy 2
  • Detectable civilizations in our galaxy 3
  • Detectable civilizations in our galaxy 4
  • Detectable civilizations in our galaxy 5

• Self Test
  Cosmology & Astronomy 1 Cosmology & Astronomy 2 Cosmology & Astronomy 3

• Labs & Simulations
  • Planetarium
  • Our Solar System
  • Celestial Sphere & Analema
  • E Horizon Star Motion
  • N Horizon Star Motion
  • S Horizon Star Motion
  • W Horizon Star Motion
  • Earth & Moon in 3D
  • Earth Phases Model
  • Galoleo's Sun Spots
  • How High The Moon
  • Lunar Eclipse
  • Lunar Month
  • Ptolemy's Mars, Jupiter Orbits
  • Ptolemy's Model Of The Inner Planets

Simply move the mouse over the subject headings above to expand the menus and then move to the the subject of your choice and click the left mouse button.