He pointed out that the shape of sunspots weren't circular.

他指出，太阳黑子不是圆形的。

The fact that sunspots are magnetic fields accounts for their dark appearance.

太阳黑子是磁场的事实解释了它们的黑色外观。

Astronomers did eventually figure out what sunspots had to do with magnetic fields.

天文学家最终确实发现了太阳黑子与磁场的关系。

He started keeping tracks of sunspots, mapping them, so he wouldn't confuse them with any potential new planet.

他开始追踪太阳黑子，标注它们的位置，这样就不会把它们和任何潜在的新行星混淆了。

What Galileo proposed was that sunspots were indeed a feature of the Sun, but he didn't know what kind of feature.

伽利略所提出的观点是，太阳黑子确实是太阳的某一个特征，但他不知道是什么特征。

When later European astronomers wrote about sunspots, they didn't believe that the spots were actually on the Sun.

后来，欧洲的天文学家们写了一些关于太阳黑子的文章，但他们并不相信这些黑子确实存在于太阳上。

When the magnetic field is at its strongest, and sunspots at their most plentiful, they cluster close to the equator.

当磁场最强，太阳黑子最丰富的时候，它们会聚集在赤道附近。

This might sound unappealing, but nightingale droppings have long been used in Japan to clear sunspots, acne marks and pigmentation.

这听起来可能没什么吸引力，但夜莺粪便长期以来在日本被用来清除祛斑、痤疮和色素沉着。

Most sunspots in a year since 1778.

自1778年以来太阳黑子活动最活跃的一年。

Sunspots are windows into the sun's magnetic soul.

正如眼睛是心灵之窗，太阳黑子是观测太阳内在磁场活动的窗口。

In the past, sunspots have disappeared for decades.

在过去，太阳黑子也曾经有过几十年无影踪的经历。

This means — you guessed it — sunspots can't exist at all.

这意味着，太阳黑子将不复存在。

Like sunspots, starspots should change in size and migrate.

像太阳黑子一样，恒星黑子大小会变会迁移。

SUNSPOTS come and go, but recently they have mostly gone.

太阳黑子来来去去，但最近它们大多已经莫明其妙地消失了。

Close to the centre of the sun, a group of sunspots is visible.

接近太阳表面中心之处，一个黑子群清晰可见。

Sunspots are caused by irruptions into its surface of the sun's deeper magnetism.

太阳黑子是由入侵活动进入太阳深层磁性表面造成的。

Other nasty effects: wrinkled and leathery skin, brown sunspots, and cataracts.

其他令人讨厌的结果还有皮肤起皱纹、变粗糙、长褐斑，还有白内障。

At the beginning of a cycle the jet stream is found, like sunspots, in mid-latitudes.

在一个活动周期开始的时候，就可以找到高速气流，像中纬度地区的太阳黑子。

The sun began to calm down in late 2007, so no one expected many sunspots in 2008.

太阳从2007年末开始平静下来，所以大家都认为2008年并不会出现大量的黑子。

Beginning in 1645, astronomers monitoring the sun observed no sunspots for 70 years.

从1645年起，整整70年得时间里天文学家没有观测到任何太阳黑子。

We don't understand why, only at a specific depth, the detection of sunspots is easier.

我们还不知道为什么只在特定深度才能比较容易探测到黑子。

Sunspots are relatively cool, dark features on the sun's surface that are often roughly circular.

太阳黑子是太阳表面相对较冷较暗的，大致呈圆形的区域。

Using it, he first observed the moon in the fall of 1609, then the moons of Jupiter, and sunspots.

1609年夏天，伽利略曾第一次用它观察了月球，之后他还观察到了木星的卫星和太阳黑子。

Last year the number of sunspots dropped to a level not seen since the beginning of the 20th century.

去年太阳黑子出现的数目降至自20世纪初以来的最低点。

Some of the images show never-before-seen detail of material streaming outward and away from sunspots.

一些照片暴露了以前我们从来没看到过的太阳上面的细节图片，比如远离或处于太阳黑子外部的物质流。

But why emerging sunspots should reveal themselves clearly at one depth but not at others is a mystery.

但是为什么黑子在这个深度而不是别的深度清楚地显现，这仍然是一个谜。

Scientists believe magnetic structures, like sunspots hold an important key to understanding space weather.

科学家认为磁性结构如太阳黑子对理解空间天气有重要帮助。

The bright glowing gas flowing around the sunspots has a temperature of over one million degrees Celsius.

这些明亮发光的气体在黑子中流动，其温度超过了一百万摄氏度。

Even with the solar cycle finally under way again, the number of sunspots has so far been well below expectations.

尽管太阳周期最终还是回到原来的样子，但是太阳黑子的数目却至今仍然低于预期。

The Solar Dynamics Observatory caught sight of the initial explosive flare emanating from a giant group of sunspots.

太阳动态观察站监测到一片太阳黑子区域发生耀斑。