Red aurora are generated by light emitted at a longer wavelength (0.630 micrometers), and other colors such as blue and purple are also sometimes observed.
红色的极光是由较长波长(0.630微米)的发出光引起的，有时也会观察到其他诸如蓝色和紫色的极光。
In this view the aurora appears blue because of the ultraviolet camera, but a Saturn-based observer would see red light flashes.
根据以此种观点，由于紫外线相机，极光看上去是蓝颜色的，但土星上的观察者看到的可能是红色的闪烁。
Since this dance comes and goes, Earthlings may have such aurora displays more frequently, and they are likely to be red!
这场舞动业已来临又离去，以后将更频繁地出现这种极光展示，并且很可能是红色的！
NASA image captured from the International Space Station shows rare aurora appearing in red.
NASA国际空间站拍到的一张罕见红色极光照片。
NASA image captured from the International Space Station shows rare aurora appearing in red.
NASA国际空间站拍到的一张罕见红色极光照片。
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