2024年或将出现20年来最佳极光观赏期
Why could now be the best time?
为什么现在是最好的时机？
Changes in the sun are set to make the appearance of the lights more likely.
太阳的变化使极光更有可能出现。
A solar cycle is an approximately 11-year period over which activity on the sun waxes and wanes.
太阳活动周期大约是11年，其间太阳活动有盛有衰。
This year will mark almost the mid-point of Solar Cycle 25, and it is heading into its most active phase.
今年几乎是太阳活动周期25的中点，它正进入最活跃的阶段。
The cycle began in 2019 according to NASA, and with magnetic changes comes a rise in the amount of activity on the sun's surface.
根据美国宇航局的说法，这个周期始于 2019 年，随着磁场的变化，太阳表面的活动量会增加。
It means more sunspots - with X-rays and magnetic fields sent towards Earth, causing geo-magnetic storms which produce auroras, another name for the Northern Lights.
这意味着更多的太阳黑子——x射线和磁场向地球发射，导致地磁风暴产生极光，北极光的另一个名字。