Shreyas and Preyas: Katha Upanishad 1.2.1–2 Explained
Read the Sanskrit, transliteration and context of shreyas and preyas. Explore discernment through clearly labelled modern examples without reducing the teaching to productivity.
॥ असतो मा सद्गमय ॥
Study Jyotish and Hindu tradition
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577–594 / 682Chaturthamsa D4 Calculation: Four Parts, Twelve Signs and Boundary Checks
Calculate D4 using four 7°30′ quarters and the 1st, 4th, 7th and 10th sign rule. Check all twelve signs, eight examples and the modality invariant.
The Moon Illusion: Why the Horizon Moon Looks Bigger
Understand the Moon illusion, compare it with real angular-size changes, and use controlled photos and an original geometry table to test what you see.
Para and Apara Vidya: Mundaka Upanishad 1.1.4–5 Explained
Read the Sanskrit distinction between para and apara vidya, the four Vedas and six Vedangas, and why knowledge of the Imperishable is a different aim.
Siddhamsa D24 Calculation: 24 Parts, Two Cycles and Exact Boundaries
Calculate Siddhamsa D24 with 1°15′ divisions, Leo or Cancer starts, ten worked examples and a lookup explaining why each sign has two degree intervals.
Why Is the Moon Visible During the Day? Phases and Daylight Windows
Understand daytime moonlight, waxing afternoon and waning morning patterns, an ideal geometry table and two examples of reading a daylight viewing window.
Bhagavad Gita 18.63 Meaning: Reflect Fully, Then Choose and Act
Read Gita 18.63 in Sanskrit, understand vimrishya and yathecchasi, compare attributed commentaries and follow the dialogue through Arjuna's response.
Shodasamsa D16 Calculation: Exact Parts, Starting Signs and D4 Differences
Calculate D16 with exact 1°52′30″ parts, movable/fixed/dual starting signs and ten worked positions. Compare D4 and verify the 16-times-longitude check.
Why Is the Moon Red or Orange? Horizon Colour vs a Lunar Eclipse
Distinguish an orange horizon Moon from an eclipsed Moon. Follow the two light paths, a simple geometry model and four clearly labelled observation exercises.
Bhagavad Gita 17.16 Meaning: Five Qualities of Mental Discipline
Read Gita 17.16 in Sanskrit and explore serenity, gentleness, silence, self-regulation and pure intention through context, attributed readings and exercises.
Trimsamsa D30 Calculation: Unequal Divisions and Exact Boundary Checks
Read the Parashari D30 tables for odd and even signs, check sixteen boundary positions and understand why thirty equal parts give a different result.
Moonrise Direction Explained: Why the Moon Does Not Always Rise Due East
Read Moon azimuth from true north, see how latitude and lunar declination change its rising point, and distinguish ideal geometry from a local prediction.
Bhagavad Gita 9.26 Meaning: A Leaf, a Flower and Devotion
Read Gita 9.26 in Sanskrit, understand its four simple offerings and key devotional words, and explore verses 9.27–28 with original reflection exercises.
Vimsamsa D20 Calculation: Complete Table, Boundaries and Worked Examples
Calculate D20 from exact sidereal longitude. Use all twenty intervals, sixteen test positions, a harmonic cross-check and a comparison with the D16 rule.
Moon Transit Explained: Meridian Crossing, Highest Altitude and Zenith
Understand lunar transit with nine latitude examples, a five-position altitude model and a reading checklist. Separate meridian crossing from being overhead.
Bhagavad Gita 12.13 Meaning: Friendship, Compassion and Freedom from Hatred
Study Gita 12.13 through Sanskrit, seven key expressions, its continuation in 12.14 and four original examples of goodwill, compassion and responsibility.
Bhamsa D27 Calculation: All 27 Parts, Exact Boundaries and Nakshatra Differences
Calculate Bhamsa D27 with a full four-element table, eighteen check positions and a harmonic proof. Distinguish its 27 portions from the 27 nakshatras.
The Lunar Terminator: Reading Crater Shadows, Moon Phases and Surface Relief
Learn why lunar craters stand out near the terminator. Work through shadow-length examples, projection limits and a practical observation record.