Mystery of star explosion 2000 years ago solved
英语课
BEIJING, Oct. 26 (Xinhuanet) -- The question, why the first documented supernova was super-sized and grew so fast, has puzzled astronomers 2 for centuries. Now it is solved by US researchers.
The supernova, an exploded star, was observed in 185 A.D. and documented as a mysterious "guest star" by Chinese astronomers. It was visible for eight months.
Scientists later found the supernova, 8,000 light years away, was a bigger-than-expected supernova remnant. BBC reported that if the infrared 3 light it emits could be seen by human eyes, it would appear to be as large as the full Moon in the sky.
Through observations in space telescopes, researchers of a latest study revealed that the explosion took place in a cavity in space, which allowed the star's remains 4 to travel out much faster and farther. The study was published online in the Astrophysical Journal Monday.
The supernova was "two to three times bigger than we would expect for a supernova that was witnessed exploding nearly 2,000 years ago. Now, we've been able to finally pinpoint 5 the cause," stated Brian Williams, lead author of the study and an astronomer 1 at North Carolina State University in Raleigh.
n.天文学家
- A new star attracted the notice of the astronomer.新发现的一颗星引起了那位天文学家的注意。
- He is reputed to have been a good astronomer.他以一个优秀的天文学者闻名于世。
n.天文学者，天文学家( astronomer的名词复数 )
- Astronomers can accurately foretell the date,time,and length of future eclipses. 天文学家能精确地预告未来日食月食的日期、时刻和时长。 来自《简明英汉词典》
- Astronomers used to ask why only Saturn has rings. 天文学家们过去一直感到奇怪，为什么只有土星有光环。 来自《简明英汉词典》
adj./n.红外线(的)
- Infrared is widely used in industry and medical science.红外线广泛应用于工业和医学科学。
- Infrared radiation has wavelengths longer than those of visible light.红外辐射的波长比可见光的波长长。
n.剩余物，残留物；遗体，遗迹
- He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
- The remains of the meal were fed to the dog.残羹剩饭喂狗了。