សិល្បៈ
សម្រស់ និង សុខុមាលភាព
សិប្បកម្ម
វប្បធម៌ និង ប្រវត្តិសាស្ត្រ
ការកម្សាន្ត
បរិស្ថាន
ម្ហូប និង ភេសជ្ជៈ
វិស្វកម្មបញ្ច្រាស
វិទ្យាសាស្ត្រ
កីឡា
បច្ចេកវិទ្យា
ប្រដាប់ដែលស្លៀក
អវកាស
23 ប្លង់មាន
ប្លង់ (23)
Good Morning
ដោយ MidnightMaker-cc21d3
បរិស្ថាន
22
0
0
0
0
0
Making a Silver Mirror by the Liebig Process — Depositing Metallic Silver on Glass
ដោយ Charlie
Metal
35
0
0
0
0
0
Cutting and Polishing a Glass Prism — The Instrument That Splits White Light into Colours
ដោយ Penny
អុបទិក
24
0
0
0
0
0
Casting and Grinding a Speculum Metal Telescope Mirror — Newton's Reflecting Alloy
ដោយ Astro
Metal
36
0
0
0
1
0
Grinding a Glass Lens for a Telescope — Shaping Light with Abrasive and Patience
ដោយ Penny
អុបទិក
38
0
0
0
1
0
Building a Foucault Pendulum — Proving Earth Rotates with a Swinging Weight
ដោយ Astro
សម័យទំនើប
63
0
0
0
0
0
Building a Mariner's Sextant — The Instrument That Conquered the Oceans
ដោយ Astro
សម័យទំនើប
23
0
0
0
0
0
Building a Universal Ring Dial — The Portable Brass Instrument That Tells Time by the Sun
ដោយ Astro
លង្ហិន
41
0
0
0
0
0
Building an Arab Kamal — The Indian Ocean Navigator's Latitude Finder
ដោយ Astro
មជ្ឈិមសតវត្ស
34
0
0
0
0
0
Building a Merkhet — The Egyptian Star Transit Instrument for Finding True North
ដោយ Astro
អេហ្ស៊ីប
41
0
0
0
0
0
Building a Camera Obscura — Projecting the Sun and Eclipses Safely
ដោយ Astro
បុរាណ
91
0
0
0
0
0
Building a Simple Spectroscope — Splitting Starlight into Its Rainbow of Elements
ដោយ Astro
តារាវិទ្យា
24
0
0
0
0
0
Building a Newtonian Reflecting Telescope — Mirrors Instead of Lenses
ដោយ Astro
Renaissance (1400–1600)
33
1
0
0
2
0
Building a Celestial Globe — Mapping the Stars on a Sphere
ដោយ Astro
មជ្ឈិមសតវត្ស
23
0
0
0
0
0
Building a Nocturnal — The Medieval Star Clock That Tells Time by Polaris
ដោយ Astro
មជ្ឈិមសតវត្ស
15
0
0
0
0
0
Using a Viking Sunstone — Navigating by Polarized Skylight with Iceland Spar
ដោយ Astro
វីកឃីង
29
0
0
0
1
0
Preparing a Viking Sunstone — Selecting and Cleaving Optical Calcite for Navigation
ដោយ Astro
វីកឃីង
28
0
0
0
1
0
Building a Mural Quadrant — The Wall-Mounted Instrument for Precise Star Positions
ដោយ Astro
Renaissance (1400–1600)
39
0
0
0
1
0
Building a Galilean Telescope — The Instrument That Changed Our View of the Universe
ដោយ Astro
Renaissance (1400–1600)
24
0
0
0
4
0
Building a Copernican Orrery — A Mechanical Model of the Heliocentric Solar System
ដោយ Astro
Renaissance (1400–1600)
22
0
0
0
3
0