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

སྐར་ཚན་རིག

བིལུ་པིརིན་ཊི ༣༣ ཡོད • ཡན་ལག་དབྱེ་རིམ ༡༧

བིལུ་པིརིན་ཊི (༣༣)

Impact Craters

Impact Craters

Astro གྱིསIS

གཟའ་སྐར

The Theodolite

The Theodolite

Astro གྱིསIS

སྐར་ཚད་རིག

The Marine Chronometer

The Marine Chronometer

Astro གྱིསIS

སྐར་ཚན་རིག

Foucault Knife-Edge Test

Foucault Knife-Edge Test

Astro གྱིསIS

ཚན་རིག

༢༡
Aryabhata's Spinning Earth — A Torch, a Ball, and Day and Night

Aryabhata's Spinning Earth — A Torch, a Ball, and Day and Night

Astro གྱིསIS

བར་དུས

༢༧
Kepler's Laws — Draw a Planet's Ellipse with Two Pins and a String

Kepler's Laws — Draw a Planet's Ellipse with Two Pins and a String

Astro གྱིསIS

Scientific Revolution (1600–1760)

༢༧
Measuring the Earth from a Single Mountain — Al-Biruni's Horizon-Dip Method

Measuring the Earth from a Single Mountain — Al-Biruni's Horizon-Dip Method

Astro གྱིསIS

བར་དུས

༢༤
Measuring How Far the Sun Is Compared to the Moon — Aristarchus' Half-Moon Method

Measuring How Far the Sun Is Compared to the Moon — Aristarchus' Half-Moon Method

Astro གྱིསIS

སྔོན་རབས

༢༣
Measuring the Circumference of the Earth — Eratosthenes' Shadow Method

Measuring the Circumference of the Earth — Eratosthenes' Shadow Method

Astro གྱིསIS

སྔོན་རབས

༢༠
Cutting and Polishing a Glass Prism — The Instrument That Splits White Light into Colours

Cutting and Polishing a Glass Prism — The Instrument That Splits White Light into Colours

Penny གྱིསDK

མདོངས་རིག

༢༤
Casting and Grinding a Speculum Metal Telescope Mirror — Newton's Reflecting Alloy

Casting and Grinding a Speculum Metal Telescope Mirror — Newton's Reflecting Alloy

Astro གྱིསIS

Metal

༣༦
Grinding a Glass Lens for a Telescope — Shaping Light with Abrasive and Patience

Grinding a Glass Lens for a Telescope — Shaping Light with Abrasive and Patience

Penny གྱིསDK

མདོངས་རིག

༣༨
ཕུའུ་ཀོ་ལ་མ་གླ་བྲག་ཆེ་བྱེད་པའི་ཐབས་ — ས་ཕོགས་གླུ་འདྲེན་གྱི་དོན་ངེས་གསལ་བྱེད

ཕུའུ་ཀོ་ལ་མ་གླ་བྲག་ཆེ་བྱེད་པའི་ཐབས་ — ས་ཕོགས་གླུ་འདྲེན་གྱི་དོན་ངེས་གསལ་བྱེད

Astro གྱིསIS

དེང་རབས

༦༣
Building a Mariner's Sextant — The Instrument That Conquered the Oceans

Building a Mariner's Sextant — The Instrument That Conquered the Oceans

Astro གྱིསIS

དེང་རབས

༢༣
Building a Universal Ring Dial — The Portable Brass Instrument That Tells Time by the Sun

Building a Universal Ring Dial — The Portable Brass Instrument That Tells Time by the Sun

Astro གྱིསIS

རག་རྫས

༤༡
Building an Arab Kamal — The Indian Ocean Navigator's Latitude Finder

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

Astro གྱིསIS

བར་དུས

༣༤
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 གྱིསIS

ཨི་ཇིབ

༤༢
Building a Camera Obscura — Projecting the Sun and Eclipses Safely

Building a Camera Obscura — Projecting the Sun and Eclipses Safely

Astro གྱིསIS

སྔོན་རབས

༡༣༣
Building a Simple Spectroscope — Splitting Starlight into Its Rainbow of Elements

Building a Simple Spectroscope — Splitting Starlight into Its Rainbow of Elements

Astro གྱིསIS

སྐར་ཚན་རིག

༢༤
Building a Newtonian Reflecting Telescope — Mirrors Instead of Lenses

Building a Newtonian Reflecting Telescope — Mirrors Instead of Lenses

Astro གྱིསIS

Renaissance (1400–1600)

༣༣