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天文学

310 件の記事

The 60-tonne (66-short-ton; 130,000-pound), 2.7 m (8 ft 10 in) Hoba meteorite in Namibia is the largest known intact meteorite.[1]

隕石の正体と分類宇宙から届くタイムカプセルの科学

隕石流星ボライド石質隕石
Debris disks detected in HST archival images of young stars, HD 141943 and HD 191089, using improved imaging processes (24 April 2014)[1]

微惑星とは何か?惑星誕生の鍵を握る「宇宙のタイムカプセル」

微惑星惑星形成原始惑星系円盤太陽系
Artist's conception of a protoplanetary disk

太陽系の誕生と進化46億年の歴史から未来の終焉まで

太陽系星雲説原始惑星系円盤惑星移動
MASCS spectrum scan of Mercury's surface by MESSENGER

水星の正体太陽に最も近い極限の世界を解き明かす

水星太陽系惑星メッセンジャー
These cutaways illustrate interior models of the giant planets. The planetary cores of gas giants Jupiter and Saturn are overlaid by a deep layer of metallic hydrogen, whereas the mantles of the ice giants Uranus and Neptune are composed of heavier elements.

天王星と海王星氷巨星の正体と形成の謎

氷巨星天王星海王星ガス巨星
Position of Uranus (marked with a cross) on 13 March 1781, the date of its discovery

天王星の謎に迫る横倒しの氷巨星が持つ特異な世界

天王星氷巨星ウィリアム・ハーシェル太陽系
A prism separates white light by dispersing it into its component colors, which can then be studied using spectroscopy.

分光法(スペクトロスコピー)の原理と多角的な応用展開

分光法スペクトロスコピー電磁スペクトル分析化学
Figure 1. The light path through a Michelson interferometer. The two light rays with a common source combine at the half-silvered mirror to reach the detector. They may either interfere constructively (strengthening in intensity) if their light waves arrive in phase, or interfere destructively (weakening in intensity) if they arrive out of phase, depending on the exact distances between the three mirrors.

干渉法(インターフェロメトリ)の原理と多角的な応用展開

干渉法インターフェロメトリマイケルソン干渉計光学的測定
Apollo 11 astronaut Buzz Aldrin walking on the surface of the Moon, which consists of lunar regolith (photographed by Neil Armstrong, July 1969).

惑星表面の地質学太陽系天体の組成と探査の最前線

惑星表面惑星地質学レゴリスサンプルリターン
Vesta, Ceres, and the Moon with sizes shown to scale

ベスタ小惑星帯に眠る「原始惑星」の記憶

ベスタ小惑星ドーンレアシルビア
Shield volcano in Tharsis region on Mars with marked borders, circles represent impact craters counted by crater counting method.

クレーター計数法による惑星表面の年代測定

クレーター計数法惑星科学年代測定二次クレーター
Lyman Spitzer played a major role in the birth of the Hubble Space Telescope project.

ハッブル宇宙望遠鏡宇宙の深淵を照らす人類の眼

ハッブル宇宙望遠鏡NASA天文学宇宙観測