2014骞磋伔绋�(ch膿ng)鑻辫獮(y菙)(鐞嗗伐椤�(l猫i))鏁欐潗闁辫畝鍒ゆ柗鏂囩珷鍙婅鏂�15

鏇存柊鏅�(sh铆)闁擄細2015-12-10 11:50:58 渚�(l谩i)婧愶細|0

鐎忚

鏀惰棌

鎽樿 鐐轰簡鏂逛究寤ｅぇ鑰冪敓鍌欒€�锛岀挵(hu谩n)鐞冪恫(w菐ng)鏍＄壒鍦版暣鐞嗕簡鏁欐潗涓婄殑绱犳潗锛屼緵澶у绶寸繏(x铆)/閬歌畝锛屽笇鏈涘皪(du矛)澶у寰�(f霉)缈�(x铆)鏈夋墍骞姪銆�

銆€銆€榛�(di菐n)鎿婇€�(j矛n)鍏ワ細2014骞磋伔绋�(ch膿ng)鑻辫獮(y菙)(鐞嗗伐椤�(l猫i))鏁欐潗闁辫畝鍒ゆ柗鏂囩珷鍖附

銆€銆€鐞嗗伐椤�(l猫i)-闁辫畝鍒ゆ柗

銆€銆€Image Martian Dust Particles

銆€銆€NASA's Phoenix Mars Lander1 has taken its first-ever picture of a single particle of rusty Martian dust with one of its microscopes. The dust particles of dust were shown at a higher magnification than anything outside of Earth that has been imaged before. The rounded particle measured only about one micrometer, or one millionth of a meter, across.

銆€銆€Taking this image required the highest resolution microscope operated off Earth2 and a specially designed device to hold the Martian dust," said Tom Pike, a Phoenix science team member from Imperial College London3. "We always knew it was going to be technically very challenging to image particles this small4.''

銆€銆€The device that imaged the dust speck is called an atomic force microscope, which maps the shape of particles in three dimensions by scanning them with a sharp tip at the end of a spring. The atomic force microscope can detail the shapes of particles as small as about 100 nanometers. And this won't be the last dust particle that Phoenix will image5. "After this first success, we're now working on building up a portrait gallery6 of the dust on Mars," Pike said.

銆€銆€Dust exists everywhere on Mars, coating the surface and giving it its rusty red color. Dust particles also color the Martian sky pink and feed storms that regularly envelope the planet. The ultra-fine7 dust is the medium that actively links gases in the Martian atmosphere to processes in Martian soil, so it is critically important to understanding Mars' environment8, the researchers said.

銆€銆€The $420-million Phoenix mission is analyzing the dust and subsurface ice layers of Mars' arctic regions to look for signs of potential past habitability. The particle seen in the atomic force microscope image was part of a sample scooped by the robotic arm from the "Snow White" trench and delivered to Phoenix's microscope station in early July.

銆€銆€瑭炲尟:

銆€銆€image v. 绻€︹€︾殑鍦栧儚 scan v. 鎺冩弿

銆€銆€magnification n. 鏀惧ぇ subsurface adj. 鍦伴潰涓嬬殑

銆€銆€micrometer n. 寰背 habitability n. 灞呬綇鎬�

銆€銆€resolution n. 鍒嗚鲸鐜�锛屾竻鏅板害 scoop v. 鎸�

銆€銆€map v. 绻埗鈥︹€︾殑鍦板湒 trench n. 婧�

銆€銆€娉ㄩ噵:

銆€銆€1. NASA's Phoenix Mars Lander: 缇庡湅(gu贸)鍦�(gu贸)瀹惰埅绌鸿埅澶╁眬鐨勯吵鍑拌櫉(h脿o)鐏槦鐧婚櫢鍣�

銆€銆€2. off earth : 鍦扮悆涔嬪

銆€銆€3. Imperial College London : 鍊暒甯濆湅(gu贸)瀛�(xu茅)闄�

銆€銆€4. image particles this small: 鎻忕躬濡傛涔嬪皬鐨勫井绮�銆俰mage particles this small鏄彛瑾�(y菙)鐨勮(shu艒)娉�锛屽叾鎰忔€濇槸image such small particles/image particles which are so small銆�

銆€銆€5. And this won't be the last dust particle that Phoenix will image: 閫欎笉鏈�(hu矛)鏄吵鍑拌櫉(h脿o)鎺冩弿鍦栧儚鐨勬渶鍚庣殑濉电矑銆傛湰鍙ョ殑瑷€澶栦箣鎰忔槸锛氱瀛�(xu茅)瀹跺皣鏈�(hu矛)鏀堕泦鏇村鐨勭伀鏄熷井绮掗€�(j矛n)琛屾巸鎻�銆�

銆€銆€6. portrait gallery: (鐏槦濉电矑)鍦栧儚闄冲垪椁�

銆€銆€7. ultra-fine : 瓒呭皬鐨�

銆€銆€8. it is critically important to understanding Mars' environment: 鐏槦濉电矑灏�(du矛)浜庝簡瑙ｇ伀鏄熺挵(hu谩n)澧冩槸妤电閲嶈鐨�銆俰t鎸囦唬涓婁竴鍙ョ殑dust锛岃€宼o鏄粙瑭�锛屾墍浠ュ悗鎺ュ嫊(d貌ng)鍚嶈 understanding銆�

銆€銆€绶寸繏(x铆):

銆€銆€1. The dust particle on Mars is the smallest particle that has been imaged outside of Earth.