单词：earth-moon trajectory
单词：earth-moon trajectory 相关文章
The Moon has always been a source of boundless fascination since ancient times. It changes its shape and location with great rapidity in the sky. It is also our closed neighbor and the only other body, besides the Earth, that humans have ever walked
国家地理2008年
The Moon We find that the moon is about 239,000 miles (384,551 km) away from the earth, and, to within a few thousand miles, its distance always remains the same. Yet a very little observation shows that the moon is not standing till. Its distance fr
双语有声阅读
今天我们要学的词是 trajectory。 Trajectory的意思是轨迹、轨道，President Trump told reporters after his speech at the UN general assembly that he hopes there would be the same trajectory for Iran as the U.S. has had with North Kore
英语单词荟萃
Moon and Jupiter 月球和木星 After traveling behind the sun for several months, the planet Jupiter is now visible again, just before sunup. Learn how to see Jupiter near the waning moon on Wednesday morning -- on today's Earth and Sky. JB: This is Ea
(科普英语)Earth and Sky
Moon and Venus月球和金星 The planet Venus is now low in the west after sunset. It's not up for long after the sun goes down, but it's very, very bright. Learn how to see Venus tonight near Earth's companion moon -- today on Earth and Sky. JB: This i
(科普英语)Earth and Sky
Harvest Moon 秋分前后之满月 Right now, as seen from the northern hemisphere, the ecliptic -- or path of the sun, moon and planets -- makes a narrow angle with the evening horizon. Learn more about the ecliptic -- and the Harvest Moon -- today on Ear
(科普英语)Earth and Sky
An astronaut stands on the surface of the Moon Scientists in the UK have expressed their enthusiasm for Chinas plans to explore the Moon with robotic spacecraft , and are keen to take part in the adventure. British scientists are seeking to collabor
Take Away English
October 31st 2011, that's the date the U.N. says the 7 billionth person will be born on Earth,7 billion.That's a crowded planet, says Dr. Jeffrey Sachs, the director of the Earth Institute at Columbia University and author of the Price of Civilizatio
万花筒2011年
On November 8th, Russia launched a probe toward the tiny Martian moon Phobos. The launch was picture-perfect, and the spacecraft, called PhobosGrunt, soared into the night sky over Kazakhstan. The good news stops there. For instead of boosting itself
Scientific American(十一)月
This is Scientific American's 60-Second Science. I'm John Matson. Got a minute? On November 8th, Russia launched a probe toward the tiny Martian moon Phobos. The launch was picture-perfect, and the spacecraft, called PhobosGrunt, soared into the nigh
Scientific American(十一)月
LOS ANGELES, June 24 (Xinhua) -- Near-Earth asteroid 2011 MD will whip past Earth on June 27, but will not pose any threat, NASA's Jet Propulsion Laboratory (JPL) said on Friday. The asteroid will pass only 12,000 kilometers (7,500 miles) above the E
英语新闻
The Moon is a very mysterious thing. It has fascinated us for thousands of years. It is mentioned everywhere in science and literature almost from the time humans started writing. And today, it still fills us with wonder. The most amazing thing about
纯正英语一分钟
But there is a downside to Jupiter. It can also deflect asteroids into orbits that cross the Earths path. The Chelyabinsk meteor appears to be one of these typical Earth-crossing events. The likelihood is that it was thrown out of its regular orbit b
探索与发现2014年
Amazing images. But what can you get out of these asan expert? What it shows us, first of all, is a great record ofthe entry of the object into the Earths atmosphere. So you see it right fromthe moment it really penetrated. And there it is. That is t
探索与发现2014年
Tonight the moon looks bigger and brighter than usual. It is a Super Moon. Actually it is a full moon but also a perigree moon when it is the closest to the Earth during its orbit. These two events are happening together tonight. It last happened Mar
新西兰英语
MADRID, Aug. 18 (Xinhua) -- China Great Wall Industry Corporation will send a Spanish rover to the moon in June 2014, according to the Galactic Suite company which heads the Barcelona Moon Team that is competing in the Google Lunar X Prize contest to
英语新闻
Chinas space program has become the first to land a spacecraft on the so-called dark side of the moon. The landing on Thursday brought the country closer to its goal of becoming a space power. The China National Space Administration said the landing
2019年VOA慢速英语(一)月
BEIJING, Nov. 7 (Xinhuanet) -- A huge asteroid will pass closer to Earth than the moon on Tuesday, but experts say there is no cause for alarm. Asteroid 2005 YU 55 will pass about 300-thousand kilometers from the earth. The giant space rock is about
英语新闻
Chicxulub is buried under two to three kilometers of limestone and mostly offshore, 奇克休留布大坑在两三公里的灰岩深处，而且大部分在近海。 which makes it difficult to study, Anderson went on, while Manson is really quite ac
万物简史
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在月亮下面.Under.The.Moon