The infrared image reveals that this dark cloud, called M17 SWex, is forming stars at a furious rate but has not yet spawned the most massivetype of stars, known as O stars.
But there's another, simpler type of solar power that USES massive mirrors to focus the heat of the sun, creating steam that can drive electric turbines.
但是，还有另一种更简单的太阳能-利用巨大的镜子来集中太阳的热量，生产驱动发电涡轮机的蒸汽。
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"How Dirty Is Your Data?" examines the amount and type of energy consumed by several top tech companies' data centers, the massive warehouses where banks of servers store information.