関連する実験動画
Updated: Jul 12, 2026

11:34
Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
ウラノスのリングの暗い面
Imke de Pater1, H B Hammel, Mark R Showalter
1Astronomy Department, 601 Campbell Hall, University of California, Berkeley, CA 94720, USA. imke@astron.berkeley.edu
まとめ
ウラノス ウラノス
科学分野:
- 惑星科学は惑星科学である.
- 天文学 天文学
- リングシステム リングシステム
背景:
- ウラノスの環は1977年に発見された.
- 天王星の環は,通常,暗黒の側面を遮る角度から見られます.
- 2007年のエッジ・オン・オリエンテーションは,ユニークな視聴の機会を提供しました.
研究 の 目的:
- ウラノスの環の照らされていない側面を画像化,分析するために.
- リングシステムの構造と組成の変化を評価する.
- 現在の観測をボイジャー宇宙船からのデータと比較する.
主な方法:
- 地上からのUranusのリングの赤外線画像の取得.
- リングシステムの薄い物質分布の分析.
- 新しいデータと過去の観測を比較する.
主要な成果:
- ウラノスの環の照らされていない側面は,劇的に変化したシステムを明らかにしました.
- 薄い物質の広範囲に広がった雲が観測され,既知のリング構造や塵帯とは関係ありません.
- 1986年のボイジャー宇宙船の画像と比較して,大きな違いが認められた.
結論:
- ウラノスの環系における塵の分布は,1986年以来,大幅な変化を遂げています.
- これらの変化は,惑星の環系で以前に観察されたよりも大きなスケールで起こります.
- 2007年のユニークな眺望角度は,ウランのリングの内部でのダイナミックな進化を強調しています.
関連する概念動画
Dark Triad and Person Perception
Person perception is influenced by both external behaviors and the observer’s internal characteristics, including personality traits. Individuals with dark personality traits, comprising psychopathy, Machiavellianism, and narcissism — collectively known as the dark triad – exhibit manipulative and exploitative tendencies in social contexts. These traits affect how they perceive others and how they are perceived.The Role of Dark Personality Traits in Person PerceptionBlack et al. (2014) explored...
The Contractile Ring
Contractile rings are composed of microfilaments and are responsible for separating the daughter cells during cytokinesis. Contractile ring assembly proceeds along with other cell cycle events; however, very few mechanistic details are known about the timing and coordination of the contractile rings with the cell cycle.
A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
The Contractile Ring
Contractile rings are composed of microfilaments and are responsible for separating the daughter cells during cytokinesis. Contractile ring assembly proceeds along with other cell cycle events; however, very few mechanistic details are known about the timing and coordination of the contractile rings with the cell cycle.
A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
Schwarzschild Radius and Event Horizon
No object with a finite mass can travel faster than the speed of light in a vacuum. This fact has an interesting consequence in the domain of extremely high gravitational fields.
The minimum speed required to launch a projectile from the surface of an object to which it is gravitationally bound so that it eventually escapes the object’s gravitational field is called the escape velocity. The escape velocity is independent of the mass of the object. Merging the idea of escape velocity with the...
The minimum speed required to launch a projectile from the surface of an object to which it is gravitationally bound so that it eventually escapes the object’s gravitational field is called the escape velocity. The escape velocity is independent of the mass of the object. Merging the idea of escape velocity with the...
Kepler's Third Law of Planetary Motion
In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. In 1909, he formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe. However, in 1918, he published his third law of planetary motion, which gives a precise mathematical relationship between a planet's average distance from the Sun and the amount of time it takes to revolve around the Sun. It...
Kepler's First Law of Planetary Motion
In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. He formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe.
Polish astronomer Nikolaus Copernicus put forth a theory that stated a heliocentric model for the solar system. According to this heliocentric theory, all the planets, including Earth, orbit the Sun in circular orbits.
On the other hand,...
Polish astronomer Nikolaus Copernicus put forth a theory that stated a heliocentric model for the solar system. According to this heliocentric theory, all the planets, including Earth, orbit the Sun in circular orbits.
On the other hand,...
