Since we complete a circle around the sun every year, the stars of summer, such as those in the Big Dipper, are always the stars of summer.

由于每年绕着太阳完成一个循环，夏日里我们所看到的星星，比如北斗七星，它们始终在其他年份的夏天里也都能看得到。

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A dark disk covers the rest of the Sun, and a white circle represents the Sun's surface.

一片黑色的光环覆盖在太阳剩余的部分，一圈白色的光环呈现在太阳的表面。

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For a cheaper, although not quite as direct, method, journey north of the Arctic circle around the summer solstice and spend a night (ideally in a hot tub) watching the sun circle above the horizon.

当然一个低成本但不是相当直接的方法是，夏至时去北极圈旅行，花一晚上的时间(能在热水缸里最好)看地平线以上的太阳圈。

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It was the Apollo group of asteroids, which circle the sun in oblong orbits, that occasionally cross Earth's.

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"It's reminiscent of the model they had of the Earth going around the sun in a circle, " he says.

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His finding that the planets circle the sun underpins much of modern science.

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