Astronomy for Astrologers
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Astronomy for Astrologers
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Module 01
Module 01: Cosmic Foundations
Master Module
Mangala Charan
#01
What is Mangala Charan and why is it important?
easy
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#02
What does the Ganesha form (elephant head + mouse vehicle) symbolize in evolutionary terms?
medium
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#03
In the Ganesha metaphor, what do Astronomy and Astrology represent?
medium
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#04
Why did mouse-like mammals survive the asteroid impact that killed dinosaurs?
easy
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Tattva Mimamsa
#01
What is Tattva Mimamsa?
easy
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#02
What does 'Tattva' mean?
easy
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#03
What does 'Mimamsa' mean?
easy
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#04
How does this chapter distinguish astronomy from astrology?
medium
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#05
What do Purusha and Prakriti represent in Samkhya?
hard
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Cosmic Singularity
#01
What is the Cosmic Singularity?
easy
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#02
What does Aitareya Upanishad 1.1.1 say about creation?
medium
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#03
How does 'Sa Ikshata' parallel quantum mechanics?
hard
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#04
Why does the unified source matter for astrology?
medium
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Fabric of the Cosmos
#01
What is Akasha and how does it differ from 'empty space'?
easy
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#02
What did Einstein's General Relativity prove about space?
medium
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#03
What is the composition of the universe according to modern physics?
hard
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#04
What is the sequence of cosmic evolution per Taittiriya Upanishad?
medium
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Cosmic Cycles & Deep Time
#01
What is precession and how fast does it occur?
medium
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#02
What is the conversion between Divine and Human years in the Yuga system?
medium
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#03
What are the four Yugas and their durations in human years?
hard
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#04
What is a Kalpa and how does it relate to Earth's age?
medium
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#05
What is Ayanamsa fundamentally?
medium
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The Living Calendar: Time in the Panchang
#01
What are Sṛṣṭigatābda and Kaligatābda?
hard
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#02
What is a Saṃvatsara and how long is its cycle?
medium
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#03
Why is Ayanamsa important for the Living Calendar?
medium
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#04
What are the primary civil eras used in Nepali Panchangs?
medium
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#05
How is Sṛṣṭigatābda calculated?
hard
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Module 02
Module 02: Scientific Foundations & Ecosystems
Master Module
Physics of the Heavens
#01
What does SSB stand for in astronomy?
medium
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#02
Why might the SSB be located outside the physical Sun?
medium
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#03
What is the 'Aberration of Light'?
medium
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#04
What is the maximum shift in arcseconds caused by annual aberration?
medium
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#05
How does the atmosphere affect the visible position of a planet near the horizon?
medium
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#06
What is the approximate light travel time from the Sun to Earth?
medium
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#07
What is the difference between Geocentric and Topocentric coordinates?
medium
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#08
Why is parallax correction critical for the Moon?
medium
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#09
Does cold air cause more or less refraction than warm air?
medium
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#10
What is the name of the effect where Earth's motion makes light appear to hit at an angle?
medium
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#11
What is the Vedic term for Axial Precession?
medium
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#12
How can Ayanamsa choice affect a person's chart synthesis?
medium
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#13
What is the 'Dark Sector' in modern cosmology?
medium
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Mathematical Foundations
#01
What is a Great Circle?
medium
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#02
What is a Small Circle?
medium
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#03
Is a line of Latitude (except the equator) a Great or Small Circle?
medium
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#04
Why is the Sexagesimal system (Base 60) used in astronomy?
medium
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#05
How many arcseconds are in one arcminute?
medium
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#06
What is the formula to convert DMS to Decimal Degrees?
medium
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#07
What does 'Modulo 360' math handle in astrology?
medium
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#08
Why must programmers be careful with modulo in code?
medium
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#09
Which two Great Circles intersect at the Equinoxes?
medium
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#10
What is the shortest distance between two points on a sphere's surface called?
medium
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The Language of the Circle
#01
What is the meaning of the Sanskrit word 'Jya'?
medium
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#02
What is the difference between Jya and modern Sine?
medium
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#03
What was the common radius ($R$) used in Surya Siddhanta math?
medium
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#04
What trigonometric function represents the vertical position of a planet on the unit circle?
medium
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#05
What trigonometric function represents the horizontal position of a planet on the unit circle?
medium
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#06
How do you find the 'true path speed' of a planet far from the equator?
medium
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#07
What is a 'Chord' in a circle?
medium
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#08
What is 'Ecliptic Projection'?
medium
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#09
Why do planets near the North Star seem to move very little compared to those near the equator?
medium
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#10
Which coordinate measures a planet's distance above or below the Ecliptic?
medium
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The Raja and Mantri System
#01
What astronomical event determines the Raja (King) of the year in the Samvatsara Phala system?
medium
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#02
Which event determines the Mantri (Minister) of the year?
medium
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#03
If the Lunar New Year falls on a Tuesday, which planet is the Raja?
medium
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#04
What is the primary significance of the Raja in collective forecasting?
medium
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#05
What does the Mantri signify in the planetary cabinet?
medium
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#06
Why is the relationship between the Raja and Mantri important?
medium
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The 108 Celestial Grid
#01
What is the degree length of one Nakshatra?
medium
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#02
What is the degree length of one Pada?
medium
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#03
How many Padas are in a single Rashi (Sign)?
medium
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#04
What is the total number of Padas in the zodiac?
medium
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#05
What is a Gandanta point?
medium
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#06
Between which two elements do Gandanta junctions occur?
medium
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#07
How many arcminutes are in 13° 20'?
medium
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#08
What is the mathematical relationship between 12 signs and 108 padas?
medium
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#09
Which Nakshatra index corresponds to the first 13° 20' of the zodiac?
medium
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#10
Why is the number 108 important in Nakshatra math?
medium
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Advanced Raja-Mantri Predictions
#01
Which planet as Raja (King) is associated with high government revenue but extreme heat and drought risks?
medium
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#02
If the Moon (Chandra) is Raja, what is the expected agricultural outcome?
medium
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#03
Which planet as Raja suggests a high risk of national conflicts and militaristic governance?
medium
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#04
When Jupiter (Guru) is the King, what is the impact on national wealth and ethics?
medium
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#05
What is the nature of a Saturn (Shani) Raja year in terms of public morale?
medium
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#06
A Mercury (Budha) Minister (Mantri) suggests what kind of economic policy?
medium
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#07
What is the typical bureaucratic behavior when Saturn is the Minister?
medium
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The Nakshatra System
#01
What are Nakshatras and how are they calculated?
easy
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#02
What are Padas and why is 108 significant?
medium
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#03
What is the difference between sidereal and synodic months?
medium
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#04
What is a Yoga Tara?
easy
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Module 03
Module 03: The Celestial Sphere & Instrumentation
Master Module
The Sphere
#01
What defines a 'Great Circle' on the Celestial Sphere?
easy
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#02
Define the Zenith and the Nadir.
easy
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#03
What is the Celestial Meridian and what happens when the Sun crosses it?
medium
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#04
What is the angle between the Celestial Equator and the Ecliptic called, and why does it exist?
hard
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Celestial Phenomena
#01
What physical mechanism is responsible for the Earth's changing seasons?
easy
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#02
How many degrees of separation between the Sun and Moon define a single astrological Tithi (Lunar Day)?
medium
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#03
Why don't we see a Solar Eclipse every single month during the New Moon?
medium
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#04
What are Rahu and Ketu in astronomical terms?
hard
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Terrestrial Coordinates
#01
What is the 'Golden Rule' relating Longitude to Time?
easy
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#02
Where is the 0° point of Longitude located?
easy
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#03
What is the difference between Standard Time and Local Mean Time (LMT)?
medium
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#04
Why do we distinguish between Geographic and Geocentric Latitude?
hard
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Celestial Coordinates
#01
What is Declination in the Equatorial Coordinate System?
easy
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#02
What is Right Ascension (RA) and why is it measured in hours?
medium
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#03
What is the 'Obliquity of the Ecliptic' and what is its value?
medium
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#04
What coordinate is used to describe a planet's position in a Zodiac sign (e.g., 10° Taurus)?
hard
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Precession of the Equinoxes (Ayanāṃśa)
#01
How long does it take for the Earth's axis to complete one full 'precession' wobble?
medium
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#02
What is the 'Ayanamsa'?
easy
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#03
What is the approximate rate of precession per year?
hard
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#04
Which star is the primary reference point for the 'Lahiri' Ayanamsa?
medium
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#05
What is the 'Great Year'?
easy
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Observational Instruments
#01
What is a Gnomon (or Shanku)?
easy
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#02
Which two measurements does a Theodolite provide?
medium
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#03
How is an Equatorial Mount 'aligned' to track stars?
medium
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#04
What is Trilateration in the context of GPS?
hard
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Vastu and Magnetism
#01
What is Magnetic Declination?
medium
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#02
What is the primary advantage of the Shanku (shadow stick) method for Vastu?
easy
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#03
Which direction does Vastu recommend for your head while sleeping, and why?
medium
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#04
What is 'True North' in astronomical terms?
easy
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Module 04
Module 04: Time, Motion & Calendars
Master Module
The Circle of Time
#01
Who compiled the Vedanga Jyotisha around 1400 BC, standardizing the Tithi and Nakshatra?
easy
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#02
What groundbreaking astronomical concept did Aryabhata propose in 499 CE regarding the movement of stars?
medium
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#03
What mathematical function, vital to modern chart calculations, was invented by Aryabhata under the name 'Ardha-Jya'?
medium
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#04
Why is Pythagoras significant to modern astrology beyond his famous triangle theorem?
hard
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Time and Motion
#01
What is the '4-minute rule' dictated by Earth's Angular Velocity?
easy
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#02
Why is a Sidereal Day roughly 4 minutes shorter than a Mean Solar Day?
medium
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#03
What does the 'Equation of Time' measure?
hard
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#04
If you move exactly 1 degree East in geographic longitude, what happens to your Local Mean Time (LMT)?
medium
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The Saros Cycle
#01
Exactly how long is one Saros Cycle?
easy
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#02
Which three lunar months must synchronize to produce the repeating Saros Cycle?
hard
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#03
Why does the 'child' eclipse in a Saros series occur 120 degrees West of its 'parent' eclipse?
medium
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#04
Roughly how long does an entire Saros Series (a full family of eclipses) last from birth to death?
medium
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Synodic Cycles
#01
What is a 'Synodic Period'?
medium
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#02
How often do Jupiter and Saturn meet in a 'Great Conjunction'?
easy
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#03
What is the maximum orb for 'Graha Yuddha' (Planetary War)?
easy
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#04
How long does it take for the Great Conjunctions to cycle through one astrological element?
hard
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#05
What is the physical reason for the 'confusion' of Planetary War?
medium
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Combustion and Elongation
#01
What is the maximum elongation of Mercury and Venus?
easy
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#02
What is Combustion (Asta) in astrology?
easy
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#03
What is Cazimi and how close must a planet be to the Sun?
hard
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#04
Why does Mars have a larger combustion zone (17°) than Venus (10°)?
medium
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Module 05
Module 05: Planetary Physics
Master Module
Planetary Mechanics
#01
What is Kepler's First Law of Planetary Motion?
easy
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#02
What is the difference between Perihelion and Aphelion?
medium
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#03
Why does a planet appear to move backward during Retrograde?
easy
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#04
What does the 'Equation of Center' calculate?
hard
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Gravity and Strength
#01
What is the Inverse Square Law of Gravity?
medium
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#02
What is the physical reason for a retrograde planet's 'strength' (Chesta Bala)?
easy
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#03
What is a Barycenter?
medium
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#04
Why is Jupiter's gravitational influence on the Sun unique?
hard
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Angular Momentum
#01
What is the formula for Angular Momentum?
medium
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#02
In an orbit, what happens to a planet's speed as its distance from the Sun decreases?
easy
Explore
#03
What is Atichara in Jyotish?
medium
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#04
How does an ice skater demonstrate angular momentum?
easy
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The Electromagnetic Spectrum
#01
What is the physical equivalent of 'Planetary Rays' (Rashmis)?
easy
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#02
What is 'Albedo'?
medium
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#03
What is the primary difference between the Sun and a planet as light sources?
easy
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#04
How are 'Aspects' explained in terms of wave physics?
hard
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Apparent Magnitude
#01
On the Apparent Magnitude scale, is a smaller number brighter or dimmer?
easy
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#02
How much brighter is a magnitude 1 object compared to a magnitude 6 object?
medium
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#03
What does the word 'Graha' literally mean, and how does it relate to magnitude?
medium
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#04
What is the approximate apparent magnitude of the Sun?
hard
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Module 06
Module 06: Stellar Astronomy & Math Refresher
Master Module
Star Classification
#01
What does Wien's Law tell us about a star's color?
medium
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#02
What is the OBAFGKM sequence?
easy
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#03
Physically, why is Mars red?
easy
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#04
What spectral type is the Sun?
medium
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#05
What is the astrological term for a planet's color?
easy
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Deep Sky Basics
#01
What are Rahu and Ketu mathematically?
easy
Explore
#02
What astronomical feature is located in the Nakshatra Mula?
medium
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#03
What physical object is the Nakshatra Krittika associated with?
easy
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#04
What is a Nebula?
easy
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#05
Why are eclipses only possible near Rahu or Ketu?
hard
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Trigonometry Refresher
#01
What do Sine and Cosine represent on the Unit Circle?
easy
Explore
#02
Why does standard geometry fail for astronomical calculations?
medium
Explore
#03
How do you convert Degrees to Radians for a computer?
medium
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#04
What is the maximum and minimum value for a Sine or Cosine function on the Unit Circle?
easy
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Interpolation
#01
What is Interpolation in astrology?
easy
Explore
#02
How do you calculate the 'Time Factor' for interpolation?
medium
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#03
Why is Extrapolation dangerous in astronomical calculations?
medium
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#04
What is the 'Boundary Ghost' at 0° Aries?
hard
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Advanced Interpolation
#01
What is the core physical assumption of 'Linear Interpolation'?
easy
Explore
#02
How many ephemeris data points are needed to perform a quadratic (curved) interpolation?
medium
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#03
Why is linear interpolation particularly dangerous for the Moon?
medium
Explore
#04
What geometric shape does a planet's path take during a retrograde station in 3-point interpolation?
hard
Explore
#05
In the Lagrange formula, what is the purpose of the 'L' values (weights)?
hard
Explore
Module 07
Module 07: The Panchanga - Foundations
Master Module
The Five Limbs
#01
What does 'Panchanga' mean and what are its five limbs?
easy
Explore
#02
Which element governs Tithi and what does it represent psychologically?
medium
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#03
What is the Chaldean order of planets?
medium
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#04
How many Nakshatras are there and what is their angular size?
easy
Explore
#05
What is the formula for calculating Yoga?
hard
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#06
What does Karana represent and how does it differ from Tithi?
medium
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Tithi (Lunar Phase)
#01
What is the Tithi calculation formula?
medium
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#02
What angular separation defines one Tithi?
easy
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#03
What causes Vriddhi and Kshay Tithis?
hard
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#04
Which Tithi number corresponds to Purnima (Full Moon)?
easy
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#05
What is the typical duration range of a Tithi?
medium
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Nakshatra (Moon Transit)
#01
What is the angular size of one Nakshatra?
easy
Explore
#02
What is the angular size of one Pada and how many Padas exist total?
medium
Explore
#03
How do you calculate the current Nakshatra from Moon's longitude?
medium
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#04
How long does the Moon take to complete one circuit through all Nakshatras?
easy
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#05
Why is the number 108 significant in Vedic astrology?
hard
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Vaar & Horā System
#01
How is the ruling planet of a weekday determined?
easy
Explore
#02
What is the complete Chaldean order of planets?
medium
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#03
Why does counting 24 hours from Sunday's Sun-ruled hour give Monday's Moon?
hard
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#04
Which element governs Vaar and what does it represent?
easy
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Yoga (Luni-Solar Harmonics)
#01
What is the Yoga calculation formula?
medium
Explore
#02
What does Yoga measure and how does it differ from Tithi?
medium
Explore
#03
Which element governs Yoga?
easy
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#04
How many Yogas exist and what is their angular span?
easy
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#05
If Sun=10° and Moon=20°, which Yoga number is active?
hard
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Module 08
Module 08: Advanced Panchanga & Calendar Synchronization
Master Module
Karana (Half-Tithis)
#01
What is a Karana and how many degrees does it represent?
easy
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#02
What is the Karana calculation formula?
medium
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#03
How many distinct Karanas exist and how are they categorized?
hard
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#04
Which element governs Karana and what does it represent?
medium
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#05
Why is Vishti Karana (Bhadra) considered inauspicious?
medium
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Panchanga Synthesis
#01
What is the correct order for reading the five Panchanga limbs?
easy
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#02
Which Panchanga limbs are most critical for marriage Muhurta?
hard
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#03
What is the general hierarchy of Panchanga limb importance?
medium
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#04
How do you handle conflicting Panchanga limbs (good Tithi but bad Karana)?
hard
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#05
What is the purpose of Panchanga synthesis?
medium
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Secondary Elements
#01
What two planets create the 60-year Samvatsara cycle, and how do their orbits align?
hard
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#02
What is the current Ayanamsha value, and what does it represent?
medium
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#03
How many degrees of Earth's orbit does one Ritu span, and how many Rituis are there?
easy
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#04
What is the annual drift between lunar and solar years that requires Adhik Maas correction?
hard
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#05
What are the elongation angle boundaries for Shukla Paksha and Krishna Paksha?
medium
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#06
How many Nakshatras fit into one Rashi, and why is this mathematically significant?
hard
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#07
What is Uttarayana astrologically, and when does it begin?
medium
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#08
What is Kshaya Samvatsara and why is it necessary?
hard
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Spherical Trigonometry
#01
What is a 'Great Circle' on a sphere?
easy
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#02
What do the internal angles of a triangle on a sphere add up to?
medium
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#03
What is the 'straightest' line possible on a curved surface called?
easy
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#04
Why do we 'clamp' values between -1 and 1 in spherical trig coding?
hard
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#05
True or False: Two planets with 90° difference in longitude are always exactly 90° apart in 3D space.
medium
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Module 09
Module 09: Chart Synthesis & Corrections
Master Module
Astronomical Corrections
#01
What is the primary cycle length for Earth's axial Nutation?
medium
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#02
What is the common analogy used to explain Annual Aberration?
easy
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#03
What is 'Topocentric Parallax'?
medium
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#04
How much can the Moon's position shift due to Parallax?
hard
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#05
What does Atmospheric Refraction do to objects near the horizon?
easy
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Calculation of the Ascendant (Lagna)
#01
What is the physical definition of the Ascendant (Lagna)?
easy
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#02
In the Northern Hemisphere, which signs are considered 'Short Ascension'?
medium
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#03
What does RAMC stand for in Ascendant calculation?
hard
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#04
Why is the 'atan2' function used in programming for the Ascendant?
hard
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#05
What is the approximate value of the Earth's 'Obliquity' (e) used in the formula?
medium
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Ephemeris vs Panchang: How to Read Both
#01
What is an 'Ephemeris'?
easy
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#02
What is the global industry standard library for high-precision astrological calculations?
medium
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#03
How do you convert 75 degrees of longitude into a Zodiac Sign?
medium
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#04
Why must you convert local time to UTC before using an Ephemeris?
easy
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#05
How many years of history does the Swiss Ephemeris cover?
hard
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Module 10
Module 10: Practical Application & Labs
Master Module
Final Capstone: Build Your Own Panchang Engine
#01
What are the 'Three Engines' required for a complete horoscope calculation?
medium
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#02
Why is the Julian Day (JD) the foundation of the Time Engine?
easy
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#03
How do you calculate the Zodiac Sign index from a raw longitude of 145.0 degrees?
medium
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#04
What is the second argument returned by the 'swe.houses' function?
hard
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#05
What is the target precision for a professionally built astronomical engine?
hard
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