标签：气体行星 相关文章
On Koyaanisqatsi, edited by homeway2000 At least 34 people have been killed in a double suicide bombing in the town of Tal-Afar in northern Iraq. The two explosions followed each other in quick succession near a courthouse reportedly used to interrog
澳洲ABC新闻快递2009年
(WASHINGTON, Reuters)Research shows that two hours of exposure to elevated levels of car emissions raises the likelihood of a heart attack. （路透社华盛顿电）研究显示，接触高浓度汽车排废气达两个小时时，会提高心脏病发
赖世雄英语新闻听力通
This giant gas bag is built from the flimsiest materials in the universe. But for all its squishy bulk, its a great little mover. Jupiter spins at such a breakneck speed that it bulges at the equator, so fast in fact that a day here lasts less than t
自然百科2012年
If you are floating in a balloon, the center of the red spot might be rather calm. But you will be going fast, your balloon will be going faster than the hurricane winds, but it might be a smooth ride. This storm is a sigh to the halt, towering five
自然百科2012年
Saturns apparently peaceful appearance is due to a haze of high level ammonia in the upper atmosphere, by looking deep into Saturn in the infrared, using the planets own internal heat as a light source, Cassini has revealed the planets true nature. T
自然百科2012年
It was unraveling a puzzle and so the magnetometer team says lets go closer, as we go closer, we watched as the star went through and noticed the change in brightness, something is going on. We can see even from a distance, there seem to be this mate
自然百科2012年
Cassini has solved the mystery of how at least one of Saturn rails' formed, and this may help solve the bigger mystery of life beyond Earth, * may be the hottest ticket in town, but don't overlook the heavy weight container for the titan lovemoon wit
自然百科2012年
Huygens landed on Titan. It/ sent back these few hundred pictures, until the batteries died and the probe froze solid. The probe landed with a thud, on basically a streambed，an area/ littered with rounded cobbles, and showed that these little rocks
自然百科2012年
The by-product of billions of years of production from the chemical smog factory in the upper atmosphere, the grains in Titan's dunes may literally fall from the sky. Like a rain of flash-frozen coffee grounds, they are swept by the wind into deep pi
自然百科2012年
Hopes and dreams of thousands of scientists and engineers are resting on the next few moments. Weve been to Saturn twice before with the voyager I and voyager II spacecraft. But rather than these quick Kodak moments, we want to take a nice long leisu
自然百科2012年
Imagine boarding a flight to Saturn, what would you need to know before traveling? The best ringside vantage points? The must-see moons? Think of this as your personal guide to the splendor of the Saturnian system. A wandering spot of light twice as
自然百科2012年
The Prime Meridian(本初子午线) here is the longitude, the mark on the ground, from which all great voyages are measured. This is the view back to our remarkable home planet/ that the first human out here can look forward to, a distant blue dot l
自然百科2012年
One day we might develop the magnetic field technology necessary to keep a human alive within Jupiters radiation environment. But in the near future, our exploration will continue by machine. The robotic program isnt about robots. Its a profoundly hu
自然百科2012年
As these robot submarines accomplish great missions, the possibility of one day melting our way into Europas deep ocean is moving from fiction toward fact. Lets just imagine, there were on a little spacecraft with the capability to melt to the ice, w
自然百科2012年
Take a night flight, like Galileos, over the surface of Io and the view down to the churning lava lakes would be unforgettable. Imagine then a visit to the surface. The landscape might look quite a bit like a red and yellow sulfur-painted version of
自然百科2012年
Have you ever fantasized about going somewhere special? Somewhere far from crowds, off the beaten track. Somewhere out of this world? Is it time to catch a rocket to the Red Planet? Mars is filled with mysteries, Volcanoes 75,000 feet tall, huge cany
自然百科2012年
If we are looking for Martian bugs, we should search for life forms at least as tough and alien as this. Im looking at Mars in a point of view of a microbe. And as a microbe, I really need very, very tiny amount of water. I could probably live my ent
自然百科2012年
So in some ways, a voyage to Mars could be a voyage home. Our ancestors have made such bold trips before when we walked out of Africa, when we sailed over the horizon. If it is technically possible, our ships will head out again. We always want to se
自然百科2012年
Try the red planet for sight-seeing on an enormous scale. Thanks to our sharp-eyed spacecraft, Mars is opening up like never before. These are real landscapes that humans will one day marvel at in person. You know, if youre going to Mars, youre going
自然百科2012年
A test run before attempting the fuel hungry and risky trip to the planet below. Dreaming about Mars and actually going there are two very different things. Mars may be our neighbour, but 35 million miles to the closest point is still a very long way
自然百科2012年