月周りの恒久的で非対称な塵雲.
M Horányi1, J R Szalay1, S Kempf1
11] Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, Colorado 80303, USA [2] Department of Physics, University of Colorado, Boulder, Colorado 80309, USA [3] Institute for Modeling Plasma, Atmospheres, and Cosmic Dust (IMPACT), University of Colorado, Boulder, Colorado 80303, USA.
Nature
|June 19, 2015
まとめ
科学者たちは,彗星の塵の衝突によって作られた,月の周りの恒久的な塵雲を発見しました. この月の塵のエクソスフィアの密度は,隕石の雨の間に増加し,他の空気のない天体の周りに同様の雲が存在する可能性があることを示唆しています.
科学分野:
- 惑星科学は惑星科学である.
- 宇宙物理学 宇宙物理学
- 天文学 (astronomy) 天文学 (astronomy) とは,天文学 (astronomy) とは,天文学 (astronomy) とは,天文学 (astronomy) とは
背景:
- 惑星間塵の衝突により,天体周辺にガスと塵の雲が形成されます.
- 塵のエクソスフィアは,氷の月の周りに観測されているが,耐火体の周りに観測されていない.
- "地平線の輝き"に関する以前の月面観測は,後の軌道データと矛盾していた.
研究 の 目的:
- 月周りの塵雲の存在と起源を調査する.
- 月塵の矛盾する観測を調和させるため.
- 空気のない天体における塵のエクソスフィアの形成を理解するために.
主な方法:
- 高地からの観測の分析. 高地からの観測の分析.
- in situ dust 機器のデータと比較する.
- 塵粒子の軌道と起源のモデリング.
主要な成果:
- 月周りの恒久的で非対称な塵雲が観測されました.
- 離心軌道上の彗星の塵粒子は,主要な源として特定されています.
- 月面の塵雲の密度は,ジェミニッド星座のような恒例の流星雨と相関しています.
結論:
- 月は,彗星の衝突によって生成された恒久的な塵のエクソスフィアを持っています.
- この発見は,耐火体上の塵雲に関する以前の仮定に異議を唱える.
- 空気のない惑星体は,似たような薄い塵雲に囲まれている可能性が高い.
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