日本无限资源_福禄影院午夜伦_美国av毛片_亚洲自拍在线观看_激情亚洲一区国产精品_999久久久久

 
Feature: Listening to cosmos in southern U.S. desert
                 Source: Xinhua | 2018-09-09 07:22:37 | Editor: huaxia

The Karl G. Jansky Very Large Array is seen on a high desert plateau, surrounded by mountains, in New Mexico, the United States, on Sept. 3. (Xinhua/ Richard Lakin)

by Richard Lakin

ALBUQUERQUE, the United States, Sept. 8 (Xinhua) -- Laying on a remote desert area in southern United States, a radio astronomers observatory attracts researchers and tourists all over the world. Being one of the busiest telescope on earth, it serves as a facility where many important discoveries were made.

The Karl G. Jansky Very Large Array (the VLA) is a radio astronomy observatory located on an isolated high desert plateau in western New Mexico state of the United States. Situated on a dry lakebed on the plains of San Agustin at 2,124 meters elevation, it is encircled by mountains, making it an ideal spot to avoid the normal wireless interference from cities. It is extremely dry there, and the lack of humidity in the air also makes for a clearer radio signal.

The VLA was named to honor Karl Guthe Jansky, who is considered to be the U.S. father of radio astronomy. Jansky was a physicist and radio engineer employed by Bell Laboratories to determine the source of interference to their overseas wireless communications. In 1933 he surprised the world's astronomers by announcing that one of the sources was extraterrestrial -- radio waves emitting from the gaseous center of the Milky Way galaxy. In the decades since, astronomers and engineers have advanced the science of translating these radio waves into observable images.

Dr. Chris Carilli, the Chief Scientist for the National Radio Astronomy Observatory explains a telescope image of explosive jets formed by matter being pulled into a black hole, in New Mexico, the United States, on Sept. 3. (Xinhua/Richard Lakin)

When the VLA first comes into view on the drive across the desert, the massive size of the array is very awe-inspiring. There are 27 radio dishes, each one 25 meters across and weighing 209 tons. The data from each dish is combined via a supercomputer, creating a singular radio telescope observation.

The dishes are arranged in a Y-shaped pattern, and are moved into different configurations on a network of railroad tracks to facilitate specific observation projects. Each of the 3 legs of the configuration contains 9 dishes and can be moved from two-thirds of a mile to 23 miles in length. The configuration changes about every 3 to 4 months to accommodate the research schedule.

Featured in the 1997 movie "Contact," where the facility received a radio transmission from an extraterrestrial source, the VLA became a popular tourist destination, with the number of visitors doubling after the movie premiered.

Despite its reputation in fictional pop culture, however, the VLA has made many real-world discoveries. More than 200 Ph.D. degrees have been awarded because of research done there. The facility makes observations of many types of astronomical objects; quasars, pulsars, supernova remnants, suns and planets, and black holes.

The Karl G. Jansky Very Large Array is seen on a high desert plateau, surrounded by mountains, in New Mexico, the United States, on Sept. 3.(Xinhua/Richard Lakin)

Dr. Chris Carilli, the Chief Scientist for the National Radio Astronomy Observatory told Xinhua: "The Very Large Array is extraordinarily powerful, the most powerful radio telescope in the world, and we perform a tremendously versatile range of science. We study things, everything from the ionosphere, our own earth's ionosphere, right out to the very first galaxies in the universe and everything in between."

In 1991, the VLA discovered ice on the planet Mercury. In 2011, astronomers found a black hole a million times bigger than our sun, 30 light years from our planet. The VLA also confirmed Einstein's theory that massive objects could create a gravitational lens that bends light.

In 2011, an upgrade project resulted in the VLA expanding its technical capacities by factors of as much as 8,000.

"Some of the high-profile work that's come out of the upgraded Very Large Array, include direct imaging of the formation of planets outside of our own solar system. Spectacular work, showing the birth of planetary systems very much like our own solar system," Carilli said.

Due to the distance from Earth and the time that radio emissions take to reach our planet, it is possible to study the primordial state of developing galaxies.

"If you move to the edge of the universe, the Very Large Array is a major component in telescopes that study the very first galaxies of the universe, galaxies that are forming within a few hundred million years of the Big Bang, meaning 5 percent the age of the universe, so right back to the beginnings of time and the VLA is imaging the cold gas out of which the first stars form," the scientist explained.

Modern astronomy techniques use multiple observation facilities to analyze the cosmos with a variety of spectrums and methods, not just a single telescope. Dave Finley, the public information officer for the National Radio Astronomy Observatory said that astronomers want to use every telescope they can to study a particular phenomenon since each telescope gives a difference piece of the overall picture.

"We routinely operate by looking at the same thing Hubble is looking at or the Chandra X-Ray Observatory or the Spitzer Infrared Observatory or other ground-based optical observatories and we will be looking at the same thing that these other observatories will be looking at. Each one of us providing a piece of the picture that lets astronomers understand the whole of what is going on," he said.

The VLA invites scientists from all over world to submit proposals for radio telescope observation projects. More than 3,000 researchers from around the world have used the VLA for over 11,000 different astronomy projects.

It is one of the busiest telescope facility on earth. As Carilli explains: "We are a national laboratory with open access to astronomers from around the world. If you have a good idea and you want to use our large telescopes to perform astronomical research, then you will submit proposals and they will be reviewed and ranked accordingly. If they're good you get observing time."

Back to Top Close
Xinhuanet

Feature: Listening to cosmos in southern U.S. desert

Source: Xinhua 2018-09-09 07:22:37

The Karl G. Jansky Very Large Array is seen on a high desert plateau, surrounded by mountains, in New Mexico, the United States, on Sept. 3. (Xinhua/ Richard Lakin)

by Richard Lakin

ALBUQUERQUE, the United States, Sept. 8 (Xinhua) -- Laying on a remote desert area in southern United States, a radio astronomers observatory attracts researchers and tourists all over the world. Being one of the busiest telescope on earth, it serves as a facility where many important discoveries were made.

The Karl G. Jansky Very Large Array (the VLA) is a radio astronomy observatory located on an isolated high desert plateau in western New Mexico state of the United States. Situated on a dry lakebed on the plains of San Agustin at 2,124 meters elevation, it is encircled by mountains, making it an ideal spot to avoid the normal wireless interference from cities. It is extremely dry there, and the lack of humidity in the air also makes for a clearer radio signal.

The VLA was named to honor Karl Guthe Jansky, who is considered to be the U.S. father of radio astronomy. Jansky was a physicist and radio engineer employed by Bell Laboratories to determine the source of interference to their overseas wireless communications. In 1933 he surprised the world's astronomers by announcing that one of the sources was extraterrestrial -- radio waves emitting from the gaseous center of the Milky Way galaxy. In the decades since, astronomers and engineers have advanced the science of translating these radio waves into observable images.

Dr. Chris Carilli, the Chief Scientist for the National Radio Astronomy Observatory explains a telescope image of explosive jets formed by matter being pulled into a black hole, in New Mexico, the United States, on Sept. 3. (Xinhua/Richard Lakin)

When the VLA first comes into view on the drive across the desert, the massive size of the array is very awe-inspiring. There are 27 radio dishes, each one 25 meters across and weighing 209 tons. The data from each dish is combined via a supercomputer, creating a singular radio telescope observation.

The dishes are arranged in a Y-shaped pattern, and are moved into different configurations on a network of railroad tracks to facilitate specific observation projects. Each of the 3 legs of the configuration contains 9 dishes and can be moved from two-thirds of a mile to 23 miles in length. The configuration changes about every 3 to 4 months to accommodate the research schedule.

Featured in the 1997 movie "Contact," where the facility received a radio transmission from an extraterrestrial source, the VLA became a popular tourist destination, with the number of visitors doubling after the movie premiered.

Despite its reputation in fictional pop culture, however, the VLA has made many real-world discoveries. More than 200 Ph.D. degrees have been awarded because of research done there. The facility makes observations of many types of astronomical objects; quasars, pulsars, supernova remnants, suns and planets, and black holes.

The Karl G. Jansky Very Large Array is seen on a high desert plateau, surrounded by mountains, in New Mexico, the United States, on Sept. 3.(Xinhua/Richard Lakin)

Dr. Chris Carilli, the Chief Scientist for the National Radio Astronomy Observatory told Xinhua: "The Very Large Array is extraordinarily powerful, the most powerful radio telescope in the world, and we perform a tremendously versatile range of science. We study things, everything from the ionosphere, our own earth's ionosphere, right out to the very first galaxies in the universe and everything in between."

In 1991, the VLA discovered ice on the planet Mercury. In 2011, astronomers found a black hole a million times bigger than our sun, 30 light years from our planet. The VLA also confirmed Einstein's theory that massive objects could create a gravitational lens that bends light.

In 2011, an upgrade project resulted in the VLA expanding its technical capacities by factors of as much as 8,000.

"Some of the high-profile work that's come out of the upgraded Very Large Array, include direct imaging of the formation of planets outside of our own solar system. Spectacular work, showing the birth of planetary systems very much like our own solar system," Carilli said.

Due to the distance from Earth and the time that radio emissions take to reach our planet, it is possible to study the primordial state of developing galaxies.

"If you move to the edge of the universe, the Very Large Array is a major component in telescopes that study the very first galaxies of the universe, galaxies that are forming within a few hundred million years of the Big Bang, meaning 5 percent the age of the universe, so right back to the beginnings of time and the VLA is imaging the cold gas out of which the first stars form," the scientist explained.

Modern astronomy techniques use multiple observation facilities to analyze the cosmos with a variety of spectrums and methods, not just a single telescope. Dave Finley, the public information officer for the National Radio Astronomy Observatory said that astronomers want to use every telescope they can to study a particular phenomenon since each telescope gives a difference piece of the overall picture.

"We routinely operate by looking at the same thing Hubble is looking at or the Chandra X-Ray Observatory or the Spitzer Infrared Observatory or other ground-based optical observatories and we will be looking at the same thing that these other observatories will be looking at. Each one of us providing a piece of the picture that lets astronomers understand the whole of what is going on," he said.

The VLA invites scientists from all over world to submit proposals for radio telescope observation projects. More than 3,000 researchers from around the world have used the VLA for over 11,000 different astronomy projects.

It is one of the busiest telescope facility on earth. As Carilli explains: "We are a national laboratory with open access to astronomers from around the world. If you have a good idea and you want to use our large telescopes to perform astronomical research, then you will submit proposals and they will be reviewed and ranked accordingly. If they're good you get observing time."

010020070750000000000000011100001374551281
主站蜘蛛池模板: 国产精品s | 欧美成人看片黄a免费看 | 黑人中文字幕一区二区三区 | 国产伦子沙发午休系列资源曝光 | 国产成人啪精品午夜网站 | 亚洲女av| 欧美不卡三区 | 乱子伦国产对白在线播放 | 日韩不卡手机视频在线观看 | 久久久久人妻综合免费无码 | 国产精品国产三级国产aⅴ原创 | 日本不卡一区在线观看 | 国产视频二区 | 老师掀起裙子让我把j放进去视频 | 亚洲少妇最新在线视频 | 国产亚洲精品久久久久久国模美 | 欧美一及 | 精品国产乱码久久久久久影片 | 日韩高清中文字幕一区二区 | 九九九在线观看 | asiantube性ass富婆 | 一级黄色免费观看 | 大地资源中文第3页 | 欧美国产视频一区二区 | 理论片午午伦夜理片影院99 | 免费级毛片 | 种付おじさんと在线观看 | 无遮挡3d黄肉动漫午夜 | 国产精品视频免费一区二区 | 欧洲成人免费aa | 国产淫伦久久久久久久 | 色噜噜成人av | 538在线一区二区精品国产 | 中文成人无码精品久久久不卡 | 伊人春色影院 | 麻豆传传媒久久久爱 | 国产一区二区三区乱码在线观看 | 精品毛片免费看 | 91免费播放人人爽人人快乐 | 91高清在线免费观看 | 成人性视频免费网站在线 |