関連する実験動画
Updated: Jul 7, 2026
11:34
Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
外側のメインベルトにある玄武石小惑星の発見
Lazzaro1, Michtchenko, Carvano
1Observatorio Nacional, Departamento de Astrofisica, Rua Gal. Jose Cristino 77, 20921-400 Rio de Janeiro, Brazil. Instituto Astronomico e Geofisico, Universidade de Sao Paulo, Av. Miguel Stefano 4200, 04301-904 Sao Paulo, Brazil. De.
Science (New York, N.Y.)
|June 17, 2000
まとめ
小惑星1459マグニャは玄武岩の表面を有しており,それは破壊され,微分化された小惑星からの希少な断片である可能性を示唆しています. そのユニークな軌道と周りの共鳴は,その生存を説明するかもしれない.
科学分野:
- 惑星科学は惑星科学である.
- 小惑星研究研究.
- スペクトル顕微鏡検査です.
背景:
- 小惑星1459マグニャは,玄武岩表面の組成を示しています.
- マグニャは3.15AUに位置し,小惑星ファミリーや大きな隣人との力学的なつながりは知られていない.
- アステロイド4ヴェスタは,2.36AUの距離にある,唯一知られている他の大きな玄武岩小惑星です.
研究 の 目的:
- 可視光線および近赤外線スペクトロスコピーを用いて小惑星1459マグニャの表面構成を調査する.
- 小惑星帯内のマグニャの軌道動態と潜在的な起源を理解するために.
- マグニャのようなユニークな小惑星を保存できるメカニズムを探求するためです.
主な方法:
- 表面鉱物学を決定するために,可視光線および近赤外線スペクトルスコピーを用いる.
- 小惑星帯の共鳴と拡散を研究するための軌道動態分析.
- マグニャの特性を他の既知の小惑星,特にヴェスタと比較した.
主要な成果:
- スペクトル観測データは,小惑星1459マグニャの玄武岩表面があることを確認しています.
- マグニャを取り巻く地域は,平均運動共鳴が豊富で,軌道拡散が遅いことを促進します.
- マグニャと小惑星ファミリー,大型小惑星,またはヴェスタの間の動的リンクは見つかりませんでした.
結論:
- 小惑星1459マグニャは,生き残った玄武岩小惑星の珍しい例です.
- 軌道共鳴は,このようなユニークな体の長期的な生存に役割を果たす可能性があります.
- マグニャは,より大きく,古代の微分化惑星小惑星の残骸であり,それは断片化されていた可能性があります.
関連する概念動画
01:13Rocket Propulsion in Empty Space - I
The driving force for the motion of any vehicle is friction, but in the case of rocket propulsion in space, the friction force is not present. The motion of a rocket changes its velocity (and hence its momentum) by ejecting burned fuel gases, thus causing it to accelerate in the direction opposite to the velocity of the ejected fuel. In this situation, the mass and velocity of the rocket constantly change along with the total mass of ejected gases. Due to conservation of momentum, the rocket's...
01:12Rocket Propulsion In Empty Space - II
The motion of a rocket is governed by the conservation of momentum principle. A rocket's momentum changes by the same amount (with the opposite sign) as the ejected gases. As time goes by, the rocket's mass (which includes the mass of the remaining fuel) continuously decreases, and its velocity increases. Therefore, the principle of conservation of momentum is used to explain the dynamics of a rocket's motion. The ideal rocket equation gives the change in velocity that a rocket experiences by...
01:21Schwarzschild 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...
01:10Detection of Black Holes
Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
01:15External Female Genitals
The vulva encompasses the external structures of the female reproductive system. At the forefront is the monpubis, a cushion of fatty tissue atop the pubic bone. Once puberty sets in, this area typically grows hair. Extending from just behind the mons pubis are the labia majora (labia = 'lips'; majora = 'larger'), which are larger skin fs olds coated with hair. Nestled within are the labia minora (labia = 'lips'; minora = 'smaller'), which are thinner, more pigmented, and hairless. While the...
01:15Quarrying of Stone
Quarrying is the process of extracting stone from a quarry, where specialized techniques are employed to remove large blocks of stone safely and efficiently. This process can involve controlled explosions or more precision-oriented methods such as cutting and drilling.
One common method involves using a diamond belt saw to cut large blocks from the quarry face. These blocks can be about 50 feet long and 12 feet high. After the initial vertical cut, drilling is performed at the base of the block.
One common method involves using a diamond belt saw to cut large blocks from the quarry face. These blocks can be about 50 feet long and 12 feet high. After the initial vertical cut, drilling is performed at the base of the block.