日期：2008-07-30 Metis is the innermost of Jupiter's known satellites: orbit: 128,000 km from Jupiter diameter: 40 km mass: 9.56e16 kg Metis was a Titaness who was the first wife of Zeus (Jupiter). Discovered by Synnott in 1979 (Voyager 1). Metis and Adrastea lie wi... 阅读全文>>

日期：2008-07-30 Jupiter is the fifth planet from the Sun and by far the largest. Jupiter is more than twice as massive as all the other planets combined (the mass of Jupiter is 318 times that of Earth). orbit: 778,330,000 km (5.20 AU) from Sun diameter: 142,984 km... 阅读全文>>

日期：2008-07-30 Deimos is the smaller and outermost of Mars' two moons. It is one of the smallest known moons in the solar system. orbit: 23,459 km from Mars diameter: 12.6 km (15 x 12.2 x 11) mass: 1.8e15 kg In Greek mythology, Deimos is one of the sons of Ares (M... 阅读全文>>

日期：2008-07-30 Phobos (FOH bus) is the larger and innermost of Mars' two moons. Phobos is closer to its primary than any other moon in the solar system, less than 6000 km above the surface of Mars. It is also one of the smallest moons in the solar system. orbit: 9... 阅读全文>>

日期：2008-07-30 Mars is the fourth planet from the Sun and the seventh largest: orbit: 227,940,000 km (1.52 AU) from Sun diameter: 6,794 km mass: 6.4219e23 kg Mars (Greek: Ares) is the god of War. The planet probably got this name due to its red color; Mars is some... 阅读全文>>

日期：2008-07-30 The Moon is the only natural satellite of Earth: orbit: 384,400 km from Earth diameter: 3476 km mass: 7.35e22 kg Called Luna by the Romans, Selene and Artemis by the Greeks, and many other names in other mythologies. The Moon, of course, has been kn... 阅读全文>>

日期：2008-07-30 Earth is the third planet from the Sun and the fifth largest: orbit: 149,600,000 km (1.00 AU) from Sun diameter: 12,756.3 km mass: 5.972e24 kg Earth is the only planet whose English name does not derive from Greek/Roman mythology. The name derives f... 阅读全文>>

日期：2008-07-30 Venus is the second planet from the Sun and the sixth largest. Venus' orbit is the most nearly circular of that of any planet, with an eccentricity of less than 1%. orbit: 108,200,000 km (0.72 AU) from Sun diameter: 12,103.6 km mass: 4.869e24 kg Ven... 阅读全文>>

日期：2008-07-30 Mercury is the closest planet to the Sun and the eighth largest. Mercury is slightly smaller in diameter than the moons Ganymede and Titan but more than twice as massive. orbit: 57,910,000 km (0.38 AU) from Sun diameter: 4,880 km mass: 3.30e23 kg In... 阅读全文>>

日期：2008-07-30 Our Sun is a normal main-sequence G2 star, one of more than 100 billion stars in our galaxy. diameter: 1,390,000 km. mass: 1.989e30 kg temperature: 5800 K (surface) 15,600,000 K (core) The Sun is by far the largest object in the solar system. It con... 阅读全文>>

日期：2008-07-08 Japan's Toyota Motor Corp. and its truck-making affiliate have joined a project to develop an environmentally friendly vehicle capable of moving both on roads and railways, an official said Monday. Japan's Toyota Motor Corp. and its truck-making aff... 阅读全文>>

日期：2008-07-08 Matches made over the Internet often do not last because people end up choosing unsuitable partners and forming emotional bonds before meeting face-to-face, an Australian university researcher has found. Matches made over the Internet often do not l... 阅读全文>>

日期：2008-07-04 Britain is considering a massive government database to store the e-mails, Internet information, phone-calls and text messages of all residents to help security forces in the fight against crime and terrorism. Britain is considering a massive govern... 阅读全文>>

日期：2008-07-04 In this photo released by the Florida Keys News Bureau, a tiny solid gold combination toothpick and earwax scoop is displayed inside a clam shell Monday, May 19, 2008, in Key West, Fla. Experts found a tiny gold combined toothpick and earwax spoon,... 阅读全文>>

日期：2008-07-01 Obese and overweight people require more fuel to transport them and the food they eat, and the problem will worsen as the population literally swells in size, a team at the London School of Hygiene Tropical Medicine says. Obese and overweight people... 阅读全文>>

日期：2008-07-01 Russian space scientists announced on Thursday a new breakthrough in a long pedigree of firsts: the birth of 30 grandchildren of a space cockroach who spent 12 days in orbit. Russian space scientists announced on Thursday a new breakthrough in a lon... 阅读全文>>

日期：2008-06-24 World's smallest one-man helicopter, GEN H-4, is seen here flying in the city of Matsumoto, Nagano prefecture, central Japan. It will soon take flight in the birthplace of Leonardo da Vinci, who is credited with having first thought of a vertical-fl... 阅读全文>>

日期：2008-06-24 More than one-third of workers would choose their mobile phone over their wallet, keys, laptop or digital music player if they had to leave the house for 24 hours and could take only one item, a new survey has found. More than one-third of workers w... 阅读全文>>

日期：2008-06-24 More than 2 million US teenagers have suffered a serious bout of depression in the past year, according to a federal government survey released on Tuesday. More than 2 million US teenagers have suffered a serious bout of depression in the past year,... 阅读全文>>

日期：2008-06-24 If a man's mother is highly educated, chances are the woman he marries will have a similar education, according to a new study. If a man's mother is highly educated, chances are the woman he marries will have a similar education, according to a new... 阅读全文>>