www射-国产免费一级-欧美福利-亚洲成人福利-成人一区在线观看-亚州成人

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: 亚洲欧美精品一区二区 | 欧美性色黄大片www 欧美性色黄大片一级毛片视频 | 国产精品黄在线观看免费 | 国产成人精品系列在线观看 | 久久88| 97视频久久 | 欧美日韩一区二区高清视 | 欧美国产高清欧美 | 国产中文字幕在线免费观看 | 99视频在线观看视频一区 | 中文字幕乱码系列免费 | 国自产精品手机在线视频香蕉 | 国内精品伊人久久久影视 | 九九久久久久久久爱 | 日韩欧美一级毛片在线 | 国产精品亚洲精品日韩已方 | 2020国产精品 | 国产亚洲精品2021自在线 | 国产成人精品视频一区二区不卡 | 韩国免又爽又刺激激情视频 | 有码视频在线观看 | 精品亚洲成a人在线观看 | 在线看欧美成人中文字幕视频 | 一级片视频免费看 | 91国内精品久久久久影院优播 | 2017天天爽夜夜爽精品视频 | 亚洲免费在线观看视频 | 国产欧美另类久久久品 | 亚洲欧美一区二区三区国产精品 | 经典国产一级毛片 | 欧美极度极度另类 | 亚洲欧美日韩一区 | 日本在线亚州精品视频在线 | 一区精品麻豆经典 | 色综合色狠狠天天久久婷婷基地 | 拍拍拍又黄又爽无挡视频免费 | 最新在线精品国自拍视频 | 99在线在线视频免费视频观看 | 男女在线免费视频 | 91热播 | 欧美一级看片免费观看视频在线 |