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汉语拼音：tài yáng hēi zǐ

出现在太阳光球层上的暗黑斑点。因比周围温度低1000～2000°c，与光球相比显得比较暗淡而得名。多呈椭圆形。直径从上千千米至几十万千米。生存时间平均约一天，少数可生存数月甚至一年以上≮子数的多寡平均以十一年为周期。大黑子群出现后，地球上常发生磁暴和电离层扰动现象。

1. 也叫日斑或黑子。太阳表面的气体旋涡，温度较邻近的区域稍低，从地球上看象是太阳表面上的黑斑，故称太阳黑子。太阳黑子有很强的磁场，因此会影响地球上短波无线电通讯。我国有世界上最早的有关太阳黑子的记录。

• This east-west flow of plasma inside the sun normally indicates the onset of sunspot formation for the next solar cycle.

  太阳内部自东向西的等离子流预示着下一个太阳周期里太阳黑子的形成。

• The sun continued to languish until mid-December, when the largest group of sunspots to emerge for several years appeared.

  太阳的了无生气一直延续下来，直到12月中旬，一组最大的可持续数年的太阳黑子出现了。

• Just as a sunspot was turning away from Earth on Sept. 8, the active region erupted, producing a solar flare and a fantastic prominence.

  9月8日正当太阳黑子开始远离地球的时候，活跃区域又发生一次爆发，同时出现一个明显的突起。

• Sunspot activity is correlated with the total amount of energy we receive from the sun.

  太阳黑子的活动性与我们从太阳那获得的总能量密切相关。

• The Sun is not considered a variable star, but it does undergo periodic changes in activity known as the sunspot cycle.

  太阳是不被认为是变星，但它的变化进行定期的活动被称为太阳黑子周期。

• It was understood that sunspot activity was not at its peak in 1932 and hence the radio waves were unlikely to be emitted from the Sun.

  据悉，1932年并非太阳黑子活动的高峰期，由此推测无线电波并非自太阳发出，央斯基认为这些无线电波是从银河系而来。

• Generally speaking, scientifically accepted records of sunspot activity do seem to be heading for a climax in the near future.

  一般而言，科学地接受记录太阳黑子的活动做似乎是一个高潮标题在不久的将来。

• Sunspots weaken and strengthen on a roughly 11-year cycle, and Earth tends to be warmer when this activity is at its peak.

  太阳黑子的增多和减少以十一年为一个周期，在太阳黑子最多的年份，地球往往要比其他时候暖和。

• The irregular shapes that surround the sunspot are known as granulation and are made of hot gas rising from inside the Sun.

  人们熟知的围绕在太阳黑子周围的不规则米粒组织是由太阳内部喷发的炽热气体形成的。