NASA spacecraft to probe possibility of life in Europa's salty ocean

Re:NASA spacecraft to probe possibility of life in Europa's ... by mrshadowgoose on Wednesday September 25, 2024 @09:32AM (#41647322)

Spool goes on the descending module.

> would think the best option would be a somewhat high power radio transmitter/receiver.

If you can figure this one out, the militaries of the world would love to have a chat with you. Water/ice is ridiculously good at attenuating EM. It's a huge issue with submarine communications.

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Re:NASA spacecraft to probe possibility of life in Europa's ... by nick238 on Wednesday September 25, 2024 @03:20PM (#41650924)

Wire-guided torpedos[1] and missiles[2] are fairly common, and the wire pays out from the projectile-side so it's not progressively dragging more and more. The more recent DM2A4 Seehecht torpedo[3] has a fiber-optic link, probably to reduce EM emissions or the detectability of a km's-long wire/antenna, despite being underwater.

[1]: https://en.wikipedia.org/wiki/Mark_48_torpedo

[2]: https://en.wikipedia.org/wiki/Wire-guided_missile

[3]: https://en.wikipedia.org/wiki/DM2A4

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