Astronomy Pages

Essays and Presentation by Larry Bogan

• The Brooklyn Street Observatory
  • Construction Photos
  • Angle Encoders installation on the 33 cm Dobsonian
• Telescope and Optics
  • Digital Setting Circles for Telescopes
  • Calculations of the magnitude limits
    
... for the eye, the telescope, and a ccd camera
• Kepler (Two Body) Orbits
• Circular, Elliptical, and Hyperbolic Orbits
• Solving Kepler's Equation for an Elliptical Orbit
• Mean, Eccentric and True Anamolies
• Orbital Equations and Calculator
• Solar System Orbits - Energy and Changing Orbits
  Travelling the Solar System by Changing Orbits
  .. A look into the orbital physics of moving from one orbit to another around the Earth and in the Solar System.- the energy wells and getting out of them
• Planetary Orbits involving Three Bodies
• Spacecraft Transfer Orbit between Earth and Mars
• Gravity Assist by Jupiter of a Spacecraft to past Saturn
• Tisserand Criteria
• Relative Apparent Motion of an Outer Planet
• Observational Astronomy
  • Moon Position, Phase and Time of Day
  • Sun Spots Observing and Coordinates
  • Time on the Earth: Solar, Siderial and Equation of Time
    Dates: Gregorian and Julian
  • Planets Occulting Planets
    .. in the past and predictions for the future.. the difficulties and probabilities.
• Stars
  • Dynamics of the Formation of Stars
    Explaining the collapse and condensation of Gas Clouds
  • Stellar Luminosity Calculator