mean synodic period*369.66 Earth days mean orbital velocity6.80 km/sec equatorial radius**25,559 km polar radius**24,973 km mass8.681 × 1025kg mean density1.27 g/cm3 gravity**887 cm/sec2 escape velocity**21.3 km/sec rotation period (magnetic field)17 hr 14 min (retrograde) ...
The larger an object is, the more velocity (speed) is needed to break free from the object.The equatorial circumference of Ariel is 3637.3 km. The surface area of Ariel is 4,211,307.59 Km^2. The surface gravity of the Ariel is 0.258 m/s². For comparison, the Earth's surface ...
when the Voyager 2 space probe sent the first up close images of Neptune back to Earth, those images revealed some interesting features in Neptune’s atmosphere, like the Great Dark Spot and the South Polar Wave. Adjusting the color contrast made those features easier to see,...
Spreen, C.M., Mueterthies, M.J., Kloster, K.W., and Longuski, J.M., "Preliminary Analysis of Ballistic Trajectories to Uranus Using Gravity-Assists from Venus, Earth, Mars, Jupiter, and Saturn," AAS Paper No. 11-623, AAS/AIAA Astrodynamics Specialist Conference, Girdwood, AK, July...
low that Earth air would turn into ice soon.The gravity on Pluto is less stronger than that on Earth.So fat persons may prefer to move there,they would weigh much less on Pluto. 答案(1)考查there be句型。句意:除了冥王星,现在太阳系有八大行星,包括地球。分析句子可知,此处为...
The strikingly low luminosity of Uranus (Teff ≃ Teq) constitutes a long-standing challenge to our understanding of Ice Giant planets. Here we present the first Uranus structure and evolution models that are constructed to agree with both the observed low luminosity and the gravity field data. ...
abundances of noble gases which can be used to reconstruct the history of planet formation in the Solar System. Finally, mapping the planets’ gravity and magnetic fields will be essential to constrain their global composition, structure and evolution....
Trafton, L. M. and Ramsay, D. A. (1980) The D/H ratio in the atmosphere of Uranus: detection of the R5(1) line of HD. Icarus, 41, 423–9. Google Scholar Tyler, G. L., Sweetnam, D. N., Anderson, J. D. et al. (1986) Voyager 2 radio science observations of the Urania...
Trafton, L. M. and Ramsay, D. A. (1980) The D/H ratio in the atmosphere of Uranus: detection of the R5(1) line of HD. Icarus, 41, 423–9. Google Scholar Tyler, G. L., Sweetnam, D. N., Anderson, J. D. et al. (1986) Voyager 2 radio science observations of the Urania...