PHP Science Labs

Some Basic Astronomy
and
Science-Related Tools

by Jay Tanner

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• Some Basic Astronomy Tools
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• Obliquity of the Ecliptic
• The J. Laskar Obliquity Paper
  
• Nutation Computations
• Sidereal Time Calculator
• Solstices and Equinoxes Calculator
• Earth Perihelion/Aphelion Calculator
• Solar System Events Calculator
• DE405 Ephemerides of the Sun, Moon, Planets, Pluto and 15 Major Asteroids From the
  USNO AE98 Asteroid Ephemerides
  
• LUNAR BASE - Moon-Related Tools
  
• YouTube - Mars vs Earth Simulation
  

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• The VSOP87 Theory
  
• About the VSOP87 Theory
• VSOP87 Equations Summary Part 1
• VSOP87 Equations Summary Part 2
• VSOP87 Series Terms Summaries
• VSOP87 Coordinates Test Values
• VSOP87 Planetary Distance Tables
• VSOP87C Heliocentric PHP Modules
• VSOP87 SOURCE CODE GENERATOR
  
• VSOP87 Theory Source Paper
• VSOP87 Theory Source Paper - PDF Version
  

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• LUNEX For POV-Ray
  A Photo-Realistic Lunar Ray-Tracing
  Tool With Texture Maps
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• LUNEX For POV-RAY - Lunar Ray-Tracing Tool
  

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• Planetary Perigee/Apogee Calculators
  Based On the JPL Horizons API
  
• Mercury Perigee/Apogee Calculator
• Venus Perigee/Apogee Calculator
• Earth Perihelion/Aphelion Calculator
• Moon Perigee/Apogee Calculator
• Mars Perigee/Apogee Calculator
• Jupiter Perigee/Apogee Calculator
• Saturn Perigee/Apogee Calculator
• Uranus Perigee/Apogee Calculator
• Neptune Perigee/Apogee Calculator
• Pluto Perigee/Apogee Calculator
  

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• Stars
  
• IAU Constellation Maps
• Distance Between Two Stars or Planets
  
• Stellar Magnitude of the Sun
• Stellar Magnitude System
• Stellar Magnitude vs Distance Calculator
• Combined Stellar Magnitude Calculator
  
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• Calendrical Date/Time Tools
  
• Julian Dates and JD Numbers For Any Month
• Julian Dates and JD Numbers For Any Year
• Inverse JD / Julian Date Calculator
• Difference Between Dates and Times
  
• USA Holidays and Special Dates Calendar
• USA Dalight Saving Time Schedule
• EU Summer Time Schedule
  
• 1582 - Julian/Gregorian Transition Calendar
• 1752 - USA Gregorian Transition Calendars
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• Some Basic Math and Science Tools
  
• Standard and Hour Angle Equivalents
  
• Sphere - Basic Properties Calculator
• Sphere - Angular Diameter Calculator
• Spere - Distance to Horizon Calculator
• Sphere - Visible Surface Fraction Calculator
  
• Spheroid Computations
• Historical Oblate Spheroid
  Parameters Calculator
• PHP Ellipse Circumference Function
  
• Variance and Standard Deviation Calculator
  
• Combinations Calculator
• Permutations Calculator
• Temperature Scale Equivalents Calculator
  
• Metric - Length Equivalents Calculator
• Metric - Weight/Mass Equivalents Calculator
  
• Earth - Geodetic Distance Calculator
• Earth - GPS Ellipsoid XYZ Calculator
  

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• Randomizing Tools
  
• Random Alphanumeric String Generator
• Random Disits String Generator
• Random Letters String Generator
• Randomize List Items or Text Lines
• Random Cards Dealer
• Random Coins Flipper
• Random Dice Roller
• Random Names Generator
• Random Latinoid Text Generator
  

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• Miscellaneous
  
• HTML/CSS Color Names and RGB Codes
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  NO SPAM
  I have a relative who can
  turn you into a frog.
  You have been warned!