October 23, 2021

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Telescope lasers could give humanity an edge in war against space junk

2 min read



Telescope operators figured out years ago how to make the stars stop twinkling. Now, a team of Australian scientists wants to use the same technology to track space junk and blast it out of space.

The problem is Earth’s atmosphere: It’s uneven and distorts light passing from space to Earth, and Earth to space. That’s a problem, because the nice twinkly effect Earth’s atmosphere gives stars makes it difficult for ground-based telescopes to accurately observe the heavens. It’s also a problem for efforts to lower the risk of space junk, which threatens satellites and crewed spaceflight, as Live Science previously reported. Ground-based stations use lasers to track individual pieces of space debris, but those lasers get distorted by the same atmospheric effects that make stars twinkle. Now, researchers want to use “adaptive optics,” a technology that enables telescopes to de-twinkle the stars, to improve those laser systems.



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