How Far Is One Light-Year? The Scale of Space, Step by Step
「1光年」がどれほど途方もない距離なのかわかる動画
Video by 宇宙ヤバイch. Cards, clips and translations by VideoAnki. Watch on YouTube ↗
About this deck
How far is one light-year? This explainer video breaks down the unfathomable scale of space, using comparisons ranging from the speed of light to the trajectory of the Voyager 1 probe. The narrator guides the viewer through the solar system and into interstellar space, visualizing distances by scaling the Earth down to a marble.
Learners will encounter vocabulary related to astronomy, physics, and mathematics. The speech is delivered at a natural, steady pace in a formal register, making it suitable for advanced students who want to practice academic and technical Japanese in a clear, structured context.
How this deck was made
Each card is cut from the original video at the exact moment the sentence is spoken, so you hear the real voice, accent and pace. The transcript and its translations were then reviewed sentence by sentence against the audio: transcription errors fixed, translations checked in context, junk cards removed.
