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First, they really missed an opportunity to rick roll everyone with this article. (just kidding)

But seriously, this went way over my head. If anyone can explain this to me like I'm 5, that would be awesome, I'm really interested in the subject but lack any real knowledge of the science.

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As charged particles fly past a planet, sometimes they whistle, and make other low frequency signals... the Earth does it, with a coil and an audio amplifier, if you live in a rural enough area, you can hear them.

These folks managed to pick up those types of signals, of a large planet orbiting a different star. I'm impressed that they were able to get that done.

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