སྒྱུ་རྩལ

མཛེས་སྡུག་དང་བདེ་ཐང

བཟོ་རིག

རིག་གནས་དང་ལོ་རྒྱུས

དགའ་སྟོན

ཁོར་ཡུག

ཟས་དང་བཏུང་རྫས

ཕྱིར་འཕྲུལ་རིག

ཚན་རིག

རྩེད་འགྲན

རིག་རྩལ

གྱོན་རུང

བིལུ་པིརིན་ཊི Sciences སྐར་ཚན་རིགརྙིང་མཐོང་སྐར་ཚན་རིག

རྙིང་མཐོང་སྐར་ཚན་རིག

བིལུ་པིརིན་ཊི ༡༢ ཡོད

བིལུ་པིརིན་ཊི (༡༢)

Building an Arab Kamal — The Indian Ocean Navigator's Latitude Finder

Building an Arab Kamal — The Indian Ocean Navigator's Latitude Finder

Astro གྱིས

བར་དུས

Building a Merkhet — The Egyptian Star Transit Instrument for Finding True North

Building a Merkhet — The Egyptian Star Transit Instrument for Finding True North

Astro གྱིས

ཨི་ཇིབ

Building a Celestial Globe — Mapping the Stars on a Sphere

Building a Celestial Globe — Mapping the Stars on a Sphere

Astro གྱིས

བར་དུས

Building a Nocturnal — The Medieval Star Clock That Tells Time by Polaris

Building a Nocturnal — The Medieval Star Clock That Tells Time by Polaris

Astro གྱིས

བར་དུས

Using a Viking Sunstone — Navigating by Polarized Skylight with Iceland Spar

Using a Viking Sunstone — Navigating by Polarized Skylight with Iceland Spar

Astro གྱིས

ཝཱི་ཀིང

Preparing a Viking Sunstone — Selecting and Cleaving Optical Calcite for Navigation

Preparing a Viking Sunstone — Selecting and Cleaving Optical Calcite for Navigation

Astro གྱིས

ཝཱི་ཀིང

Building a Mural Quadrant — The Wall-Mounted Instrument for Precise Star Positions

Building a Mural Quadrant — The Wall-Mounted Instrument for Precise Star Positions

Astro གྱིས

Renaissance (1400–1600)

Building a Galilean Telescope — The Instrument That Changed Our View of the Universe

Building a Galilean Telescope — The Instrument That Changed Our View of the Universe

Astro གྱིས

Renaissance (1400–1600)

Building a Copernican Orrery — A Mechanical Model of the Heliocentric Solar System

Building a Copernican Orrery — A Mechanical Model of the Heliocentric Solar System

Astro གྱིས

Renaissance (1400–1600)

Building a Cross-Staff — The Medieval Navigator's Angle-Measuring Instrument

Building a Cross-Staff — The Medieval Navigator's Angle-Measuring Instrument

Astro གྱིས

བར་དུས

Building a Brass Astrolabe — The Islamic Golden Age Instrument That Mapped the Sky

Building a Brass Astrolabe — The Islamic Golden Age Instrument That Mapped the Sky

Astro གྱིས

རག་རྫས

Building a Chinese Armillary Sphere — The Bronze Instrument That Mapped the Heavens

Building a Chinese Armillary Sphere — The Bronze Instrument That Mapped the Heavens

Astro གྱིས

ལི་རྫས