1. What Is a Planet? : Is Pluto a Planet? A Historical Journey through the Solar SystemWeintraubDavid A
It contributes to the warming.答案：D 分析：答案:D 解析:细节理解题。根据第五段第一句 Observations of the thickness of Pluto's atmosphere in 2002 suggested the dwarf planet was warming even as its orbit took it further from the Sun. 可知,冥王星厚厚的大气层导致了冥王星变暖。故 D项正确。
If your dominant planet is Pluto, you are a Plutonian. You are not afraid of the dark side of life. Others may find you intimidating or fascinating. Either way, you leave an impact! You can be stubborn and even ruthless, but you have a strong sense of justice and a lot of inner str...
The eight planets of this solar system — Pluto having been formally demoted by the International Astronomers Union to the status of a dwarf planet — may be divided into the smaller terrestrial planets of Mercury, Venus, Earth and Mars, and the larger gas planets of Jupiter, Saturn, Uranus ...
The case for Pluto's planet-ness According to Dr. Grundy, Plutoisa planet. "I use the word 'planet' to refer to it, and most of the planetary science community does too," Grundy said. "Pluto's got everything I like in a planet, in spades. It's got a satellite system. It'...
Why does the earth have life while the otherplanets(行星) don't? For one thing, the earth has justthe right temperature. As the third planet from thesun,the earth seems to be just the right distanceaway. The planets which are closer to the sun are sohot because their surfaces are ...
What planet is Neptune from the sun? What is the mass of the planet Saturn? Which planet is farthest from the sun besides Pluto? How many planets are larger than Saturn? How many rings does the planet Saturn have? How many planets is Jupiter from the sun? What is the planet after Satu...
Planet: A planet is defined as a mostly-spherical object that orbits a star and has generally cleared that orbit of other materials. There are eight such objects in our own solar system now that Pluto has been reclassified as a dwarf planet. Because most stars are thought to have planets,...
Most planets in the solar system have got solar system moons. Because our planet, Earth, has only one planet n.moon, we call it the Moon. Although it's one of the largest moons in the solar system, the Moon is smaller than all the planets except Pluto. The Moon Pluto n.is about ...
the size of Jupiter or larger and close enough to their suns to be very, very hot.So if all we believed about planet formation was based on our own solar system, and it turns out that our solar system lacks at least one fairly common type of planet.Then what does that say about ...