英语听力：自然百科 太阳核磁爆

 NASA's twin Stereo spacecrafts called "Behind" and "Ahead" captured rare footage of the Sun erupting over about a 30 hour period between September 26th and 27th.

 

From the Behind perspective on the left, the long filament¹, darker than the Sun's surface, can be seen rising up and then breaking away, spreading out above most of the Sun's surface.

 

As seen from the Ahead spacecraft on the right, the filament is seen in profile and is called a prominence², which NASA describes as clouds of cooler gas suspended above the Sun's surface by magnetic forces.

 

The eruption³ was so large that both spacecrafts were able to observe the sensation for hours on end. It was one of the most spectacular events observed by the mission.

 

NASA says the cloud lifted up, broke away and headed out into space.

The Stereo mission launched 3 years ago, and its two satellites have been sending back 3D images of the sun, providing data for more accurate alerts for solar storms.

1 filament   

n.细丝；长丝；灯丝

参考例句：

• The source of electrons in an electron microscope is a heated filament.电子显微镜中的电子源，是一加热的灯丝。
• The lack of air in the bulb prevents the filament from burning up.灯泡内缺乏空气就使灯丝不致烧掉。

2 prominence   

n.突出；显著；杰出；重要

参考例句：

• He came to prominence during the World Cup in Italy.他在意大利的世界杯赛中声名鹊起。
• This young fashion designer is rising to prominence.这位年轻的时装设计师的声望越来越高。

3 eruption   

n.火山爆发；（战争等）爆发；（疾病等）发作

参考例句：

• The temple was destroyed in the violent eruption of 1470 BC.庙宇在公元前1470年猛烈的火山爆发中摧毁了。
• The eruption of a volcano is spontaneous.火山的爆发是自发的。