三级aa视频在线观看-三级国产-三级国产精品一区二区-三级国产三级在线-三级国产在线

中文USEUROPEAFRICAASIA
World / US and Canada

Star-rich galaxy found from universe's baby years

(Agencies) Updated: 2014-02-11 10:35

Star-rich galaxy found from universe's baby years

A Hubble Space Telescope deep image of galaxy cluster Abell 2744 is seen in this NASA/ESA image released February 7, 2014. [Photo/Agencies]

CAPE CANAVERAL - Astronomers have found an old and distant galaxy that is believed to date back to a time when the universe was just 650 million years old, a fraction of its current age.

The galaxy, known as Abell 2744_Y1, is about 30 times smaller than the Milky Way, but pumping out stars at a prodigious rate.

If confirmed, the newly found galaxy would push back the universe's galaxy-formation clock by 100 million years to 650 million years after the Big Bang explosion some 13.8 billion years ago.

Another candidate galaxy, which was discovered in 2012, dates back to just 500 million years after the birth of the universe.

Abell 2744_Y1 is the first distant galaxy to be found during a new Hubble Space Telescope project that makes use of naturally occurring zoom lenses in space. These occur when objects with extremely powerful gravity, such as a cluster of galaxies, bend and magnify light from more distant objects, relative to Earth's line of sight.

Occasionally, the warped space will bring into focus a more distant object, such as it did with Abell 2744_Y1.

"The cluster of galaxies act as additional lens and can convert the mirror of the Hubble Space telescope to a mirror at least 10 times larger," astronomer Nicolas Laporte, with the Astrophysics Institute of the Canary Islands, wrote in an email to Reuters.

The technique, known as "gravitational lensing" has been used before to ferret out distant galaxies. But the new initiative not only taps the resolving power of Hubble, but combines its images with observations by sister telescopes that detect infrared and X-ray light.

With the right alignment, astronomers hope the cosmic lenses will reveal galaxies that formed as early as 300 million years after the Big Bang, Laporte added.

The research will be published in the journal Astronomy and Astrophysics Letters.

 

Trudeau visits Sina Weibo
May gets little gasp as EU extends deadline for sufficient progress in Brexit talks
Ethiopian FM urges strengthened Ethiopia-China ties
Yemen's ex-president Saleh, relatives killed by Houthis
Most Popular
Hot Topics
...
主站蜘蛛池模板: 婷婷丁香视频 | 日本特级黄毛片毛片视频 | 极品国产一区二区三区 | 成人在线观看网址 | 91精品久久久久久久久中文字幕 | 能看的黄色网址 | 91日本在线 | 色悠久久久久综合欧美99 | 国产精品高清一区二区三区不卡 | 青青操免费在线视频 | 不卡免费在线视频 | chinese乱子伦videos | 欧美成人性色xxxx视频 | 国产精品免费视频能看 | 亚洲欧美色欧另类欧 | 黄色免费观看 | 九九九九热精品免费视频 | 亚洲在线免费 | 国产二区三区 | 黄色录象一级片 | 日本精品久久久中文字幕 | 国产精品日本欧美一区二区 | 原创国产视频 | 国产欧美二区三区 | 日韩色影院| 国产精品午夜寂寞视频 | 大学生a级毛片免费观看 | 国产视频一区二区三区四区 | 伊人色综合久久天天网蜜月 | 特一级黄色毛片 | 精品国产999 | 国产精品亚洲精品久久成人 | 嫩草视频在线观看视频播放 | 国产高清自拍视频 | 欧美线人一区二区三区 | 久久成人视 | 日韩黄色在线视频 | 欧美一区欧美二区 | 欧美三级黄 | 一级毛片儿 | 国产视频资源在线观看 |