We present a series of models of Uranus and Neptune in which the relative amounts of (1) rock, (2) ices, and (3) hydrogen and helium are allowed to vary. By fitting the density and the gravitational quadruppole moment, the model composition can be determined. Because of the ambiguity ...
The composition and structure of the Uranian atmosphere, as determined from Voyager data, are described. It is observed that the atmosphere contains He, CH4, C2H2, HD, CH3D, and NH3; it has an effective temperature of -216 C; it is tilted 98 deg to the plane of the ecliptic; and the...
信号词为for example,在解释如何通过观察来间接推断出大气层成分的部分,教授通过两个例子进行具体说明:For example,we know its mass and volume,so we are able to calculate its density.Knowing Uranus’density gives us ideas about its chemical makeup,即了解星球的密度可以帮我们了解构成,因此C选项是正确...
However, objections were raised regarding the specific degree of roundness needed for qualification and the challenges of accurately determining the shapes of distant objects. Some argue for including factors like an object’s location and composition in defining a planet, considering its dynamics and o...
The branch of astronomy that deals with the composition and structure of the planets of the solar system and with the relationships, similarities, and differences between them. plan′e·to·log′i·cal(plăn′ĭ-tl-ŏj′ĭ-kəl)adj. ...
摘要: Provides information on the interiors of giant planets inside and outside the solar system. Why the structure and composition of giant planets is evolving; Division of interiors of Jupiter and Saturn; Structure of Uranus and Neptune; Radii of extrasolar giant planets....
From their dynamic behavior and the composition and structure of matter, the Saturnian system is similar to a miniature solar system. For example, scientists discovered an atmosphere and liquid water on Titan. Some scientists have thought that the moon might be an asteroid captured by its host ...
As scientists developed better instruments, they continued to learn more about the structure and composition of the rings. Saturn has many rings made of billions of particles of ice and rock, ranging in size from a grain of sugar to the size of a house. The particles are believed to be de...
The axis of rotation of Neptune (28.32°) and especially that of Uranus (97.8°) show that these planets have undergone titanic collisions testifying to the violent past of our solar system. This chaotic period shaped the structure and composition of the solar system as we know it today. It...
Composition and Structure: With a mean radius of24,622 ± 19 km, Neptune is the fourth largest planet in the Solar System. But with a mass of1.0243 × 1026kg –which is roughly 17 times that of Earth – it is the third most massive, outranking Uranus. Due to its smaller size and ...