Set as Homepage - Add to Favorites

日韩欧美成人一区二区三区免费-日韩欧美成人免费中文字幕-日韩欧美成人免费观看-日韩欧美成人免-日韩欧美不卡一区-日韩欧美爱情中文字幕在线

【teen experimenting with sex video】A tiny galaxy ceased making stars for billions of years. Then it rebooted.

Most small galaxies that stopped making new stars in the early universe never resumed operations. Something caused their celestial factories to shutter. 

But researchers have teen experimenting with sex videoused the James Webb Space Telescope, a collaboration of NASAand its European and Canadian spacecounterparts, to zero in on a dwarf galaxy that bucked the trend, rebooting its star formation after a billions-of-years-long hiatus. 

The dwarf galaxy, known as Leo P and about 5.3 million light-yearsfrom Earth, is offering new insights into galaxy evolution and the factors necessary to keep galaxies growing and churning out new stars.  


You May Also Like

"We have a measurement like this for only three other galaxies — all isolated from the Milky Way — and they all show a similar pattern," said Kristen McQuinn, the principal investigator on the study, in a statement.

SEE ALSO: Astronomers just witnessed a whole galaxy 'turn on the lights' in real-time James Webb Space Telescope against a starry backgroundThe James Webb Space Telescope zeroed in on dwarf galaxy Leo P to study its star-formation history. Credit: NASA GSFC / CIL / Adriana Manrique Gutierrez illustration

Astronomers have learned that galaxies tend to start out small and grow larger by collecting gas and merging with other galaxies. But most dwarf galaxies that made stars before the so-called Epoch of Reionizationnever got back to business after. 

Reionization was an era of major transition that occurred more than 13 billion years ago.  It was when the baby universe transformed from a neutral state to one filled with free electrons and protons. 

Prior to it, the gas in the primitive universe was mostly opaque. That's why scientists refer to the period before as the cosmic "dark ages." Researchers are trying to better understand the processes that allowed the universe to become fairly transparent. 

Mashable Light Speed Want more out-of-this world tech, space and science stories? Sign up for Mashable's weekly Light Speed newsletter. By clicking Sign Me Up, you confirm you are 16+ and agree to our Terms of Use and Privacy Policy. Thanks for signing up!

Because most of the tiny galaxies turned off their star-making activity in the first few billion years after the Big Bang, many scientists have thought reionization was the reason. But that understanding may be skewed by biased data.

A portion of the dwarf galaxy Leo P.Researchers used Webb to take pictures of Leo P, gathering data for some 15,000 stars. Credit: NASA / ESA / CSA / K. McQuinn / J. DePasquale

Most studies have focused on small galaxies nearby, making it difficult to conclude whether it was reionization or some other environmental factors, like the influence of neighboring large galaxies, including the Milky Way. Galaxies in denser clusters are surrounded by hot gas, stymying the collection and cooling of gas needed to churn out new stars. 

That's why McQuinn's team picked Leo P, a more isolated galaxy than the 80-or-so tiny ones within our region of space, known to astronomers as the "local group." The findings, presented at the 245th meeting of the American Astronomical Society in Maryland this past week, are published in The Astrophysical Journal

Leo P — the P stands for "pristine" — is mostly composed of hydrogen and helium, the same primitive material that emerged out of the Big Bang. Given that most of the chemicals in the universe are thought to have come from exploded dead stars, scientists have rationalized that the firstborn starsmust have been almost entirely formed of these original elements.


Related Stories
  • Webb telescope spots proof of the first stars to light the universe
  • Webb sees shockwave continuing hundreds of years after supernova blast
  • The best telescopes for gazing at stars and solar eclipses in 2024
  • Carter's UFO hounded him for years. Few knew his expertise in astronomy.
  • What most people think they know about the Big Bang is wrong
A timeline of the visible universeReionization was an era of major transition that occurred more than 13 billion years ago. Credit: NASA / STScI

The researchers used Webb to take pictures of Leo P, gathering data for some 15,000 stars. By measuring their brightness and color, astronomers could estimate the stars' ages. This allowed them to map out the stellar birth rate over time. 

The team speculates that high heat in the galaxy may have suspended star formation. Then, as the universe cooled down, stars began to form again. But why would Leo P experience a renaissance that many others galaxies of its kind wouldn't?

Perhaps it's not just the mass of the galaxy that mattered but whether it was close to larger galaxies, too.

The team intends to study four more isolated dwarf galaxies to see if they share similar star-forming history.

0.1728s , 14254.5 kb

Copyright © 2025 Powered by 【teen experimenting with sex video】A tiny galaxy ceased making stars for billions of years. Then it rebooted.,Public Opinion Flash  

Sitemap

Top 主站蜘蛛池模板: 亚洲色无码中文字幕手机在线 | 精品国产乱码久久久久久一区 | 给我个可以免费看片的 | 波多野结衣与老人系列 | 国产成人精品一区二区3 | 亚洲爆乳av无码专区 | 内射白浆一区二区在 | 激情五月综合婷婷 | 日韩欧美国产精品 | 亚洲欧美色图小说 | 人妻熟女视频一区二二区 | 国产成人综合亚洲看片 | 国产成人精品福利一区二区三区 | 国产亚洲精品自在线亚洲情侣 | 韩国免费特一级毛片 | 欧美日韩亚 | 亚洲欧美日韩尤物aⅴ一区 亚洲欧美日韩在线不卡中文 | 国产高清在线精品一区在线 | 成人区精品人妻一区二区不卡 | 成年无码a | 精品人妻无码一区二区色欲产成 | 国产精品伦理一区二区三区 | 日本免费精品视频丁香婷婷 | 亚洲麻豆av无码成人片在线观看 | 欧美大肥婆大肥BBBBB | 日本人妻不卡一区二区三区中文字幕 | 国产乱码卡二卡三卡4 | 国产精品国产精品偷麻豆 | 亚洲毛片v无码一区二区 | 一二三四在线观看免费高清在 | 国产三级专区精 | 少妇乱子伦精品无码 | av无码欧洲大片 | 欧美性生交大片免费看A片 欧美性生交大片免费看A片免费 | 国产精品亚洲专区无码唯爱网r | 免费观看又色又爽又黄的小说一 | 国产成人久久精品麻豆二区33 | 久久精品亚洲麻豆av一区二区 | 亚洲日本韩国在线 | 日本无吗不卡在线观看 | 成人爽a毛片在线视频网站 成人爽免费视频在线观看 成人爽爽激情在线观看 |