-
Guide
-
Lifestyle
-
Tech and Vogue
-
TechandScience
-
CHTF Special
-
Nanhan
-
Asian Games
-
Hit Bravo
-
Special Report
-
Junior Journalist Program
-
World Economy
-
Opinion
-
Diversions
-
Hotels
-
Movies
-
People
-
Person of the week
-
Weekend
-
Photo Highlights
-
Currency Focus
-
Kaleidoscope
-
Tech and Science
-
News Picks
-
Yes Teens
-
Fun
-
Budding Writers
-
Campus
-
Glamour
-
News
-
Digital Paper
-
Food drink
-
NIE
-
Speak Shenzhen
-
Business_Markets
-
Shopping
-
Travel
-
Restaurants
-
Hotels
-
Investment
-
Overview
-
In depth
-
Leisure Highlights
-
Sports
-
World
-
QINGDAO TODAY
-
Entertainment
-
Business
-
Markets
-
Culture
-
China
-
Shenzhen
-
Important news
在线翻译:
szdaily -> Tech and Science
Comet defies death, brushes up to sun and lives彗星穿越死亡旅途
     2011-December-21  08:53    Shenzhen Daily

    A small comet survived what astronomers expected to be a sure death when it danced uncomfortably close to the sun.

    Comet Lovejoy, which was only discovered a couple of weeks ago, was supposed to melt Thursday night when it came close to where temperatures hit several million degrees. Astronomers had tracked 2,000 other sun-grazing comets which made the same suicidal* trip. None had ever survived.

    But astronomers watching live with NASA telescopes first saw the sun’s corona wiggle* as Lovejoy went close to the sun. They were then shocked when a bright spot emerged on the sun’s other side. Lovejoy lived.

    Lovejoy didn’t exactly come out of its hellish adventure unscathed*. Only 10 percent of the comet — which was probably millions of tons — survived the encounter, said W. Dean Pesnell, project scientist for NASA’s Solar Dynamics Observatory, which tracked Lovejoy’s death-defying plunge*.

    And the comet lost something pretty important: its tail.

    “It looks like the tail broke off and is stuck” in the sun’s magnetic field*, Pesnell said.

    Comets circle the sun and sometimes get too close. For a small object often described as a dirty snowball comprised of* ice and dust, that brush with the sun should have been fatal.

    The frozen comet was evaporating* as it made the trip toward the sun, “just like you’re sweating on a hot day,” Pesnell said.

      (SD-Agencies)

深圳报业集团版权所有, 未经授权禁止复制; Copyright 2010, All Rights Reserved.
Shenzhen Daily E-mail:szdaily@szszd.com.cn