相关实验视频
Updated: Jul 10, 2026

10:35
Bringing the Visible Universe into Focus with Robo-AO
Published on: February 12, 2013
木星云的组成,分层,对流和波动:从新地平线的观点
D C Reuter1, A A Simon-Miller, A Lunsford
1NASA Goddard Space Flight Center, Code 693, Greenbelt, MD 20771, USA. dennis.c.reuter@nasa.gov
概括
新地平线号的数据揭示了木星大气中的高速中层波和短暂的氨冰云. 这些发现为气体巨头天气层的动态和稳定性提供了新的见解.
科学领域:
- 行星科学 行星科学
- 大气动力学 大气动力学
- 流体力学 流体力学 流体力学
背景情况:
- 木星的大气表现出复杂的天气模式.
- 旅行者号之前的观测暗示了中等尺度波.
研究的目的:
- 分析来自新地平线航天器关于木星大气现象的新数据.
- 为了研究木星天气层的稳定性和动态.
主要方法:
- 在新地平线航天器上使用仪器进行大气观测.
- 分析了高空间分辨率 (11-45公里) 的中介面波数据.
- 在多次木星旋转 (200-140公里分辨率) 上进行了红外光谱测量.
主要成果:
- 观测到的中等尺度波浪的波长为300公里,相速超过局部流量100米/秒.
- 在上游地区检测到短暂的氨冰云,寿命低于40小时.
- 这些现象为在可见云顶以下的大气动力学提供了洞察力.
结论:
- 观察到的波动力学挑战了现有的大气模型.
- 过渡的氨云表明了活跃的垂直运输过程.
- 新地平线号的数据增强了对木星大气过程的理解.
相关概念视频
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,...
Kepler's Second 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. His first law states that all planets orbit the Sun in an elliptical orbit, with the Sun at one of the ellipse's foci. Therefore, the distance of a planet from the Sun varies throughout its revolution around the Sun.
While in an elliptical orbit, the total energy of the planet is conserved. Therefore, the planet slows down when it is at apogee and...
While in an elliptical orbit, the total energy of the planet is conserved. Therefore, the planet slows down when it is at apogee and...
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...
Planes in Space
A plane in three-dimensional space is fundamentally characterized by a point that lies on the plane and a normal vector that is perpendicular to its surface. This normal vector uniquely determines the orientation of the plane, making it an essential geometric descriptor. In architectural applications, such as the installation of a sloped glass panel on a building façade, this mathematical model provides a precise representation of the panel’s position and orientation in space.Let r₀ be the...
Acceleration due to Gravity on Other Planets
The gravitational acceleration of an object near the Earth's surface is called the acceleration due to gravity. It can be measured by conducting simple experiments on Earth. However, such an experiment is impossible to conduct on the surface of other planets.
Astronomical observations are thus used to measure the acceleration due to gravity on other planets. This can be determined by observing the effect of a planet's gravity on objects close to it. The crucial factor that helps in this...
Astronomical observations are thus used to measure the acceleration due to gravity on other planets. This can be determined by observing the effect of a planet's gravity on objects close to it. The crucial factor that helps in this...
The Principle of Superposition and the Gravitational Field
The principle of superposition applies to gravitational forces of objects that are sufficiently far apart. It states that the net gravitational force on a point object is the vector sum of the gravitational forces on it due to various objects. The principle helps calculate the force by listing the individual forces and then vectorially summing them up. However, it should be noted that the principle of superposition is not always apparent. In the presence of a second force, the first force could...

