NASA 宇宙の記録
今日の天体写真 (APOD)= カレンダーから選ぶ「宇宙の神秘」=

1995年から今日まで、NASAが1日1枚選定してきた「Astronomy Picture of the Day（APOD）」を日本語で楽しめるアーカイブ・ギャラリーです。神秘的な星雲から最新の惑星探査まで、詳細な解説とともにご紹介します。カレンダーからあなたの大切な日の星空を探したり、ランダム表示で未知の宇宙に出会ったり、時空を超えた宇宙の旅をお楽しみください。

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銀河面：電波と可視光線 The Galactic Plane: Radio Versus Visible

What does the Milky Way look like in radio waves? To better find out, GLEAM surveyed the central band of our galaxy in high resolution radio light as imaged by the Murchison Widefield Array in Australia. As the featured video slowly scrolls, radio light (71 - 231 MHz) is seen on the left and visible light -- from the same field -- on the right. Differences are so great because most objects glow differently in radio and visible light, and because visible light is stopped by nearby interstellar dust. These differences are particularly apparent in the direction toward the center of our galaxy, seen about a third of the way through. Among the many features that appear in the radio, bright red patches are usually supernova remnants of exploded stars, while areas colored blue are stellar nurseries filled with bright young stars. Did you know: APOD is available from numerous sites, including social media?

原文（English）

What does the Milky Way look like in radio waves? To better find out, GLEAM surveyed the central band of our galaxy in high resolution radio light as imaged by the Murchison Widefield Array in Australia. As the featured video slowly scrolls, radio light (71 - 231 MHz) is seen on the left and visible light -- from the same field -- on the right. Differences are so great because most objects glow differently in radio and visible light, and because visible light is stopped by nearby interstellar dust. These differences are particularly apparent in the direction toward the center of our galaxy, seen about a third of the way through. Among the many features that appear in the radio, bright red patches are usually supernova remnants of exploded stars, while areas colored blue are stellar nurseries filled with bright young stars. Did you know: APOD is available from numerous sites, including social media?

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© NASA / APOD