These are epsilon Eridani, a single K star at a distance of 10.5 light-years, and the red dwarf GJ 674 at a distance of 14.8 light-years.

他们是距离为 10.5 光年的一颗 K 等单星 epsilon Eridani 和距离为 14.8 光年的红矮星 GJ 674。

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Researchers in America and the U. K. are developing special materials that steer light around an object.

美国和英国的学者正在研发特别的材质，能将光线从物体周围移开。

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The light - colored minerals of K -rich volcanic rocks in this area are alkaline feldspar, leucite and nepheline.

本区富钾火山岩中浅色矿物有碱性长石、白榴石和霞石。

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It's pretty rare that a portable solar-based device offers much more utility than impressing your friends, but PiSAT Solar's K-Light won't only make you the coolest kid on your block: it might actually prove useful the next time you take a hike or find yourself hanging out in a developing country.

ENGADGET: PiSAT Solar's K-Light boasts a one-to-one charging ratio

K-Light is designed for up to 10 years of full daily use in such a scenario, and PiSAT is working on an adapter to let the lantern's battery also charge a cellphone.

ENGADGET: PiSAT Solar's K-Light boasts a one-to-one charging ratio

That should be great for campers, but where the K-Light really "shines" (so to speak) is in places like Africa, where villagers without electricity often use makeshift kerosene lanterns for light at night.

ENGADGET: PiSAT Solar's K-Light boasts a one-to-one charging ratio