Set as Homepage - Add to Favorites

九九视频精品全部免费播放-九九视频免费精品视频-九九视频在线观看视频6-九九视频这-九九线精品视频在线观看视频-九九影院

【浜松 ポルノ映画】A NASA rover just exposed something on Mars that eluded orbiters

A NASArover taking rock samples on 浜松 ポルノ映画Marshas uncovered a plentiful mineral that was invisible to orbiters studying the Red Planet from space.

Scientists say the discovery of siderite, a type of iron carbonate, could be crucial evidence to support the theory that Mars once had a thick carbon dioxide-rich atmosphere, allowing a warm enough environment to support oceans, lakes, and streams.  

Curiosity, a car-sized lab on six wheels, performed a chemical analysis of four rock samplesdrilled at different elevations of Mount Sharp, a mountain it has been exploring within Gale Crater. Three of the samples showed considerable amounts of siderite. Another sample, which had no significant traces of siderite, contained other iron-rich minerals that can form as siderite breaks down. 


You May Also Like

This iron carbonate mineral is known to form on Earth under specific chemical conditions involving water, iron, and carbon dioxide. The study, published in the journal Science, suggests more carbon is stored in the Martian crust than previously thought. And if similar carbonates exist in other sulfate-rich regions, they could represent a hidden trove of Mars’ ancient atmosphere.

"The discovery of abundant siderite in Gale Crater represents both a surprising and important breakthrough in our understanding of the geologic and atmospheric evolution of Mars," said Benjamin Tutolo, lead author of the paper, in a statement.

SEE ALSO: These scientists think alien life best explains what Webb just found Curiosity rover taking a selfie on MarsNASA's Curiosity rover snaps a selfie image on lower Mount Sharp in Gale crater in August 2015. Credit: NASA / JPL-Caltech / MSSS

The results contribute to mounting evidence that ancient Mars had the right chemical and environmental conditions not only to have liquid water but also to trap and cycle carbon in the air — factors that may speak to the planet’s past habitability.

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!

Scientists have had a long-standing theory that Mars used to have surface water. But for that to happen, the planet also would have needed to be warmer, with higher air pressure. That has led them to believe that though Mars' atmosphere is extremely thin today, it must have been thick and carbon dioxide-rich in the past. 

Volcanoescould have released large amounts of carbon dioxide into the air. Over time, some of that gas escaped into space, but enough probably stayed to support lakes and rivers. 

Over the past three decades, researchers have found lots of evidence that water flowed on ancient Mars. But up until now there's been a missing puzzle piece for the atmosphere within the rock record: Carbon dioxide in the air and water almost certainly would have reacted with rocks to create various carbonate minerals, so where are they?


Related Stories
  • Scientists found huge beaches on Mars likely from a long gone ocean
  • NASA's rovers just found similar gnarly rocks on opposite sides of Mars
  • The best telescopes for gazing at stars and solar eclipses in 2024
  • NASA asked for cheaper ways to get Mars samples. It had one all along.
  • NASA's Mars rovers had a gangbusters summer of rocks
Curiosity exploring a region with sideriteAt a Martian site nicknamed Ubajara, NASA's Curiosity rover discovers siderite, an iron carbonate mineral that might solve a mystery about how the planet lost its thicker atmosphere. Credit: NASA / JPL-Caltech / MSSS

After drilling less than 2 inches below the surface, Curiosity used its CheMin instrument to conduct X-ray diffraction analyses of rock and soil samples, according to the new paper. The presence of siderite in them means the rocks likely formed in calm water like lakebeds, not volcanoes or lava. On Earth, siderate tends to form in shallow lakes and swamps. 

Curiosity also detected sulfates, minerals that form when water evaporates. Geologists glean clues about a planet's past from the order in which minerals formed. That siderite came first in the sequence suggests a gradual drying of ancient Martian lakes, leaving behind these other minerals. The sample that didn't have siderite but had evidence of its breakdown materials supports the notion that Mars’ carbon cycleused to be active but became unbalanced over time.

"Drilling through the layered Martian surface is like going through a history book," said Thomas Bristow, a NASA research scientist and co-author of the paper. "Just a few centimeters down gives us a good idea of the minerals that formed at or close to the surface around 3.5 billion years ago."

If similar carbonates are found in other sulfate-rich layers across Mars, they could hold large amounts of carbon — perhaps equal to or even more than the carbon dioxide in Mars’ air today. Future observations could confirm these findings and illuminate how the planet changed as it lost its atmosphere.

0.1387s , 9884.5 kb

Copyright © 2025 Powered by 【浜松 ポルノ映画】A NASA rover just exposed something on Mars that eluded orbiters,Data News Analysis  

Sitemap

Top 主站蜘蛛池模板: 国产精品一区二区免费 | 欧美精品视频一区 | 亚洲精品高清国产 | 国产精品人成在线播放 | 欧美亚洲一区二区三区导航 | 在线观看国产91精品 | 欧美日韩成人午夜电影 | 99re热视频在线 | 国产在线91下载 | 亚洲欧洲淘宝天堂日本 | 亚洲激情自拍偷 | 午夜免费一级视频 | 中文字幕精品亚洲一区 | 国产亚洲精品九九久在线观看 | 日本中文字幕在线视频一区 | 国产又黄又猛又粗又爽 | 免费国产h视频在 | 亚洲成年人电影在线观看 | 欧洲亚洲日韩中文字幕首页 | 亚洲一级qv无 | 人成午夜免费视频拍拍拍 | 国产在线精品国自产在线 | 国产色无| 欧美在线观看h片 | 国产欧美一区二区精品性色 | 国产丝袜视频一区二区三区 | 免费高清手机在线观看 | 国产91精品高清一区二区三区 | 国产一区二区三区正品 | 五月丁香六月婷婷综合网缴情 | 亚洲色偷精品一区二区三区 | 精品一区二区三区在线免 | 中文字幕精品一区二区精品 | 亚洲欧洲国产码专区在线观看 | 高清在线?视频大全 | 国产精品国产精品国产专区不卡 | 午夜国产福利看片 | 青青草91| 国产美女在线观看 | 明星合成 | 污网站在线观看视频平台 |