a我考网

 找回密码
 立即注册

QQ登录

只需一步,快速开始

扫一扫,访问微社区

查看: 69|回复: 0

[托福阅读] 新托福阅读材料:Hubblespotsaplanet-eatingstar

[复制链接]
发表于 2012-8-14 23:21:39 | 显示全部楼层 |阅读模式
Scientists used Hubble data to create an image of the planet being swallowed.  
8 W4 A6 m% Q; f  The Hubble Space Telescope has captured evidence of a Sun-like star "eating" a nearby planet.+ o* k, k# _* z0 Q$ m
& o& x( _6 J  Z5 Z
  Astronomers knew that stars were capable of swallowing planets in orbit around them, but this is the first time the event has been "seen" so clearly.  |# [! _0 ^+ ^. |

& Z, n3 w' z" q, Z# J; e  Z  Although the planet was too far away for Hubble to photograph, scientists have created an image of it, based on analysis of the telescope's data.
" L# ~9 o' R+ x4 B9 f; \ ! G5 j4 B. R/ t8 x5 C# z
  The discovery was published in the The Astrophysical Journal Letters.$ o0 y9 r3 g" [' }

& \* E. c: }; \' T  The researchers say the planet, which is called Wasp-12b, may only have another 10 million years left before it is completely devoured.
& E) V9 h3 h6 n6 `2 n
6 ]; `& A$ h: g' p" I% D" @$ g  It is so close to its star that it completes an orbit in 1.1 Earth days and is superheated to more than 1,500C.( `  _7 k  n9 K# p$ i
$ j/ f5 J+ _7 X+ ~
  Because of this proximity, the planet's atmosphere has ballooned to nearly three times the radius of Jupiter and is spilling material on to the star.
2 g: g) z7 }4 h' Z8 o5 {( ]8 k
8 w) \. @! b  w; f/ X# |  Carole Haswell from the UK's Open University led the research team. She explained: "We see a huge cloud of material around the planet which is escaping and will be captured by the star."
7 U& y# y/ L* u$ f; M  V
! Y8 _+ j  ?, P: e" b$ m4 [2 B  Hubble's detection of the cloud enabled scientists to draw conclusions about how it was generated.
( r+ a; t# C3 T+ E8 m" {
2 J0 y; U8 y. ?$ @  Dr Haswell said: "We have identified chemical elements never before seen on planets outside our own Solar System."
& K0 n" Q# G) Z 4 r/ p  G$ n6 H
  Wasp-12 is a dwarf star located approximately 600 light-years away in the constellation Auriga.
4 [5 \( A, B7 R
# D2 ~5 i; u" `$ S, g' N/ X9 |  The exoplanet was first discovered by the UK's Wide Area Search for Planets (Wasp) in 2008.
回复

使用道具 举报

您需要登录后才可以回帖 登录 | 立即注册

本版积分规则

Archiver|手机版|小黑屋|Woexam.Com ( 湘ICP备18023104号 )

GMT+8, 2024-11-16 05:30 , Processed in 0.351259 second(s), 21 queries .

Powered by Discuz! X3.4 Licensed

© 2001-2017 Comsenz Inc.

快速回复 返回顶部 返回列表