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在maven nasa這個產品中，有4篇Facebook貼文，粉絲數超過136萬的網紅關鍵時刻，也在其Facebook貼文中提到， 火星大氣層流失原因是…地球成下個目標！？ #珊迪仔:紅色星球有越來越多發現，說不定它真的地球的孿生兄弟… NASA在美國東岸時間5日下午2時（台灣時間6日凌晨3時）發布對於火星大氣層的「驚人發現」！火星探測器「MAVEN」回傳的數據中顯示，火星的氣候曾經有大改變！ 科學家相信早在35億年前，火...

maven nasa 在 關鍵時刻 Facebook 的最佳解答

關鍵時刻 By 關鍵時刻

2015-11-06 11:00:02 有 579 人按讚
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火星大氣層流失原因是…地球成下個目標！？

#珊迪仔:紅色星球有越來越多發現，說不定它真的地球的孿生兄弟…

NASA在美國東岸時間5日下午2時（台灣時間6日凌晨3時）發布對於火星大氣層的「驚人發現」！火星探測器「MAVEN」回傳的數據中顯示，火星的氣候曾經有大改變！

科學家相信早在35億年前，火星的大氣層有相當的厚度，大氣溫暖潮濕，就如現今的地球一樣，孕育著萬物生命，如今變為寒冷乾燥，應是受到太陽風的持續且強烈的吹拂，以每秒100克的速度漸漸流失氣體，再加上火星不像地球一樣擁有磁場可以保護大氣層免受太陽風的威脅，因此，儘管火星曾擁有大氣層保護，但時至今日，火星大氣層已變得「薄如紙、乾如骨」。

而科學家預估，在2022年將有可能出現極端太陽風暴，如果真的遭到侵襲，引發太陽耀斑將導致全球性大停電、終止網絡及廣播等信號長達數月，對過度依賴電力的現代社會造成災難性影響…

目前最嚴重的太陽風暴事件，被稱為「卡林頓事件」，發生於1859年9月，當時導致一些電報線發生爆炸，並燒燬了一些電報局，最終造成歐洲和北美停電…不過也不用太過擔心，科學家表示僅有12%的機率。

#關鍵番外篇 #火星 #大氣層 #地球 #紅色星球 #孿生兄弟 #NASA #MAVEN #太陽風暴 #太陽耀斑 #全球性大停電 #卡林頓事件

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maven nasa 在 มติพล ตั้งมติธรรม Facebook 的最讚貼文

มติพล ตั้งมติธรรม By มติพล ตั้งมติธรรม

2015-11-06 05:22:07 有 689 人按讚
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องค์การอวกาศนาซาเผยลมสุริยะเป็นต้นเหตุที่ทำให้ดาวอังคารสูญเสียชั้นบรรยากาศ

ในการแถลงข่าววันนี้ (5 พ.ย. 58) องค์การอวกาศนาซาได้เปิดเผยผลการศึกษาของโครงการ Mars Atmosphere and Volatile Evolution (MAVEN) ซึ่งเป็นโครงการศึกษาชั้นบรรยากาศของดาวอังคารว่า ต้นเหตุที่ทำให้ชั้นบรรยากาศของดาวอังคารเปลี่ยนจากชั้นบรรยากาศที่อุ่นและประกอบไปด้วยน้ำ กลายเป็นชั้นบรรยากาศที่เยือกเย็นและแห้งอย่างทุกวันนี้ว่ามาจากลมสุริยะ

ข้อมูลจาก MAVEN บอกเราว่าดาวอังคารกำลังสูญเสียชั้นบรรยากาศอยู่ตลอดเวลาจากลมสุริยะที่เข้ามาประทะ โดยลมสุริยะกำลังทำให้ดาวอังคารสูญเสียชั้นบรรยากาศไปในอัตรา 100 กรัมทุกๆ วินาที ซึ่งเมื่อเวลาผ่านไปนาน เทียบเท่ากับมวลชั้นบรรยากาศอันมหาศาลที่สูญเสียไป ทำให้เกิดการเปลี่ยนแปลงเป็นดาวอังคารอย่างที่เรารู้จักกันทุกวันนี้

นอกจากนี้ MAVEN ยังค้นพบว่าในช่วงที่มีลมพายุสุริยะรุนแรงในปี ค.ศ. 2015 อัตราการสูญเสียของชั้นบรรยากาศนั้นมีเพิ่มมากขึ้นอย่างมีนัยะสำคัญ ทำให้ค้นพบว่าอัตราการสูญเสียชั้นบรรยากาศจากลมสุริยะน่าจะเป็นตัวการสำคัญที่ทำให้ดาวอังคารสูญเสียชั้นบรรยากาศไป

ลมสุริยะประกอบด้วยอนุภาคมีประจุ เช่น โปรตอนและอิเล็กตรอน ด้วยอัตราเร็ว 2 ล้านกม./ชั่วโมง การเคลื่อนที่ของอนุภาคเหล่านี้จะเหนี่ยวนำให้เกิดสนามแม่เหล็ก และสนามไฟฟ้า ช่วยเร่งให้ไอออนในชั้นบรรยากาศของดาวอังคารหลุดออกไปสู่ห้วงอวกาศได้

เรามีหลักฐานมากมายที่บ่งบอกว่าเมื่อครั้งหนึ่งในอดีต พื้นผิวของดาวอังคารเคยมีน้ำซึ่งเป็นของเหลวไหลมาก่อน หลักฐานทางธรณีวิทยามากมาย ตั้งแต่ร่องน้ำ สามเหลี่ยมปากแม่น้ำ รวมไปถึงผลึกแร่ธาตุที่เกิดขึ้นได้ในสภาพที่มีน้ำไหลอย่างต่อเนื่องเท่านั้น บ่งบอกให้เห็นว่าเมื่อก่อนดาวอังคารควรจะมีชั้นบรรยากาศหนากว่าปัจจุบันนี้ ซึ่งน้ำที่เป็นของเหลวจะระเหิดไปอย่างรวดเร็ว

การค้นพบของ MAVEN ช่วยยืนยันได้ว่าลมสุริยะเป็นตัวการหลักที่ทำให้ดาวอังคารสูญเสียชั้นบรรยากาศไป นอกจากนี้ยังมีตัวการอื่นอีกมากที่อาจจะทำให้สูญเสียชั้นบรรยากาศไปได้ ซึ่งจะมีแต่ทำให้การสูญเสียนี้เป็นไปได้รวดเร็วยิ่งขึ้น โดย MAVEN จะทำการศึกษาต่อไป

ทั้งนี้ ลมสุริยะก็มีผลต่อชั้นบรรยากาศบนโลกเราเช่นกัน แต่ด้วยสนามแม่เหล็กที่เข้มของโลกของเรา ทำให้อัตราการสูญเสียชั้นบรรยากาศของโลกเรานั้นช้ากว่าดาวอังคารเป็นอย่างมาก ถึงแม้ว่าสนามแม่เหล็กของโลกจะมีการอ่อนแรงลงและกลับขั้วอยู่หลายครั้งในอดีต แต่ก็ไม่ได้เกิดขึ้นในระยะเวลาที่มากพอที่จะทำให้เกิดความเปลี่ยนแปลงครั้งใหญ่เช่นดาวอังคารได้

อ้างอิง/อ่านเพิ่มเติม
[1] http://www.nasa.gov/…/nasa-mission-reveals-speed-of-solar-w…
[2] วีดีโอ animation แสดงการสูญเสียชั้นบรรยากาศจากลมสุริยะ https://www.youtube.com/watch?v=gX5JCYBZpcg

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maven nasa 在 Newtalk新聞 Facebook 的最讚貼文

Newtalk新聞 By Newtalk新聞

2013-11-19 11:38:03 有 19 人按讚
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美國國家航空暨太空總署(NASA)18日發射無人探測機「專家號」(Maven)到火星，以探查圍繞火星、非常稀薄的大氣其成分的組成。此圖為NASA提供的想像圖。

圖片來源：美國國家航空暨太空總署(NASA)。

◎延伸閱讀：
〈NASA發射探測機 籌備人類登陸火星〉
http://newtalk.tw/news/2013/11/19/42053.html

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NASA's Mars Atmosphere and Volatile Evolution has completed the first of five deep-dip maneuvers designed to gather measurements closer to ...

#63. The Mars Atmosphere and Volatile Evolution (MAVEN) Mission

The MAVEN spacecraft launched in November 2013, arrived at Mars in September 2014, and completed commissioning and began its one-Earth-year primary science ...

#64. Infographic: The Tech Behind NASA's MAVEN Mars Mission

NASA's next mission to Mars is scheduled to launch Monday. Global aerospace, defense, and information solutions firm Exelis is supporting ...

#65. NASA's MAVEN mission blasts off to find clues to life on Mars

NASA's Atlas V United rocket carrying the MAVEN spacecraft launches from Cape Canaveral. (Reuters: Joe Skipper).

#66. NASA's MAVEN maps winds in the martian upper atmosphere

Researchers have created the first map of wind circulation in the upper atmosphere of a planet besides Earth, using data from NASA's MAVEN ...

#67. MAVEN spacecraft enters Mars orbit | CNN Business

NASA's MAVEN craft will live up to its formal name – the Mars Atmosphere and Volatile Evolution craft – by helping scientists figure out how ...

#68. NASA's MAVEN spacecraft enters orbit around Mars - The ...

NASA is another step closer to finding out what happened to water on Mars. The Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft ...

#69. NASA's Maven spacecraft arrives at Mars - Haaretz Com

NASA launched Maven last November from Cape Canaveral, the 10th U.S. mission sent to orbit the red planet. Three earlier ones failed, and until ...

#70. Nasa's Maven Spacecraft Detects Metal In Mars Atmosphere

Nasa says its MAVEN spacecraft which is exploring Mars atmosphere to understand how the red planet lost most of its air, has detected ...

#71. NASA's Maven spacecraft successfully enters orbit around Mars

NASA's Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft successfully entered Mars' orbit...

#72. MAVEN: NASA's Upcoming Mission to Mars - AddThis

Next Monday, NASA will launch a probe to Mars. It's called the Mars Atmosphere and Volatile EvolutioN probe, or MAVEN, and it's designed to ...

#73. NASA's MAVEN Orbiter Celebrates One Year Around Mars

Today marks one year since NASA's Mars Atmosphere and Volatile Evolution (MAVEN) mission entered orbit around our planetary neighbor.

#74. NASA's MAVEN Mission's UV Imaging Confirms Mars's ...

NASA's Mars Atmosphere and Volatile Evolution Mission (MAVEN) has been studying the Red Planet's atmosphere since 2013, but on Monday, ...

#75. MAVEN: NASA's Next Mission to Mars - SpaceRef

MAVEN : NASA's Next Mission to Mars ... Mars missions. NASA hosted a news briefing at 2 p.m. EDT Monday, Oct. 28, to discuss the upcoming launch of ...

#76. NASA's MAVEN Mars probe safely brakes into orbit - CBS News

Ten months and 442 million miles outbound from Earth, NASA's MAVEN spacecraft fired its braking rockets Sunday to slip into orbit around the ...

#77. NASA's MAVEN mission gives unprecedented ultraviolet view ...

New global images of Mars from the MAVEN mission show the ultraviolet glow from the Martian atmosphere in unprecedented detail, revealing ...

#78. General Dynamics Provides Transponder For NASA's MAVEN ...

The General Dynamics Small Deep Space Transponder is providing a critical telecommunications link for the ongoing NASA MAVEN (Mars ...

#79. NASA's Maven explorer arrives at Mars after a year - The Hindu

NASA confirmed that the robotic explorer slipped into Martian orbit as planned. Now the real work begins for the $671 million mission.

#80. NASA Mars Maven Enters Orbit - Business Insider

NASA's next Mars spacecraft, MAVEN, entered orbit Sunday night, 10 months after launching from Cape Canaveral in Florida.

#81. NASA's MAVEN spacecraft enters orbit around Mars

NASA's MAVEN spacecraft braked into orbit around Mars on Sunday after a 10-month interplanetary cruise from Earth, positioning the probe to ...

#82. NASA's MAVEN Mission Investigates Mars' Atmosphere | KQED

NASA's latest mission to Mars, MAVEN (Mars Atmospheric and Volatile Evolution), entered Martian orbit less than a month ago on September 21.

#83. MAVEN Launches Successfully - Luxel Corporation

This morning shortly before 10:30 AM PST NASA's MAVEN (Mars Atmosphere and Volatile EvolutioN) spacecraft successfully launched aboard the ...

#84. Early Results From NASA's MAVEN Mars Orbiter Provide ...

MAVEN is observing the upper atmosphere of Mars to help understand climate ... Image Credit: NASA/GSFC NASA's newest Mars orbiter, MAVEN, ...

#85. NASA news: 'Unexpected and surprising' Mars mission ...

NASA : MAVEN spacecraft reveals shocking discovery on Mars. Sign up HERE for science breakthroughs in health, business and more that matter.

#86. Understand the Differences : NASA's MAVEN and ISRO's MOM

NASA's Mars Atmosphere and Volatile EvolutioN (MAVEN) is a space probe designed to study the Martian atmosphere while orbiting Mars.

#87. La misión MAVEN prestará su apoyo a las naves que llegan a ...

El Centro de Vuelo Espacial Goddard de la Nasa en Greenbelt, Maryland, gestiona el proyecto MAVEN. Lockheed Martin Space construyó la nave ...

#88. Yearbook on Space Policy 2016: Space for Sustainable Development

... horizon.101 NASA's Mars Atmosphere and Volatile EvolutioN (MAVEN) mission ... While sensitive equipment aboard MAVEN was turned off during the flyby, ...

#89. The Atmosphere: A Very Short Introduction - 第 111 頁 - Google 圖書結果

More recently, the NASA MAVEN (Mars Atmosphere and Volatile Evolution) mission was inserted into a Martian orbit in September 2014 and has collected ...

#90. The Sun, Planets, and Dwarf Planets - 第 348 頁 - Google 圖書結果

820”NASA's Mars Odyssey Shifting Orbit for Extended Mission” ... NASA. Retrieved 2007-03-03. 828”NASA Selects 'MAVEN' Mission to Study Mars Atmosphere” ...

#91. Strange New Aurora Stretches Halfway Across Mars And No ...

Four years ago NASA's MAVEN probe discovered Martian proton auroras. Analysis revealed some positively charged particles capture electrons ...

#92. Telescopes Trained on Parker Solar Probe's Latest Pass ...

As NASA's Parker Solar Probe completes its latest swing around the Sun, it's doing so in full view of dozens of other spacecraft and ...

#93. Eight planetary science missions earn extensions - The ...

Following a thorough evaluation, NASA has extended the planetary science missions ... MAVEN, and Mars Science Laboratory (Curiosity rover).

#94. NASA to repurpose OSIRIS-REx for second asteroid encounter

A NASA mission to return samples from one near Earth asteroid will get ... Mars Odyssey, Mars Reconnaissance Orbiter, MAVEN and New Horizons ...

#95. Mars' sky gets a mysterious green aurora resembling a giant ...

One is NASA's Mars Maven mission, launched in 2013. The other is Mars Express, an ESA mission that began operations in 2004.

#96. Motorola Razr 3 aka Maven Leaked in Photos, Resembles ...

Motorola Maven's photos, the upcoming Razr smartphone, have surfaced online. The Maven will be the third generation handset from Razr.