this post was submitted on 13 Mar 2025
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Science Memes

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[–] Yorick@sh.itjust.works 107 points 1 day ago (4 children)

The magic of a clear line of sight and vacuum for a good ~384'300km!

So should we do low power communications by using the moon as reflector dish?

[–] slazer2au@lemmy.world 79 points 1 day ago (1 children)

Also, directional vs omnidirectional antennas.

[–] facepainter@lemm.ee 45 points 1 day ago (1 children)

This is the most important part.

[–] deadbeef79000@lemmy.nz 20 points 1 day ago (1 children)

And not encoding any data. Well a laser pulse is kind of datum.

[–] meyotch@slrpnk.net 18 points 1 day ago

One bit! That’s all you get!

[–] Hugin@lemmy.world 39 points 1 day ago (1 children)

There was a NSA program that listened to soviet messages by collecting the transmissions that bounced off the moon.

[–] DaveyRocket@lemmy.world 5 points 3 hours ago* (last edited 3 hours ago)

I gotta say, the moon’s really starting to sound like a fucking snitch.

[–] PhobosAnomaly@feddit.uk 26 points 1 day ago

Two thirds of a million kilometres under good conditions and at a precise angle to get a picture of goatse moontooth'd to my phone

Welcome to 2025!

[–] mexicancartel@lemmy.dbzer0.com 21 points 1 day ago* (last edited 1 day ago) (1 children)

I am worried about 2000ms ping

[–] Rhaedas@fedia.io 6 points 1 day ago

That's what the anti-tachyon modulation circuit is for, to change the time phase and remove most of that lag. Once they're in sync, it's literally real time!

the distance is 384400km

That's almost the distance between my bed and the kitchen before my first cup of coffee!

[–] zaphod@sopuli.xyz 28 points 1 day ago (3 children)

It's easy, you just need a big antenna, low noise receiver (just cool it) for low bandwidth (keeps noise power low) and no interferers in the same frequency band.

[–] Trollception@sh.itjust.works 1 points 5 hours ago (1 children)

Perfect. Now put those on cell phones and make it fit in your pocket.

[–] frezik@midwest.social 1 points 2 hours ago

Technology always gets better with no regard to physical limits.

(People who argue this unironically are a pet peeve of mine. Yes, there are limitations on what's possible.)

[–] Zwiebel@feddit.org 9 points 1 day ago (1 children)
[–] zaphod@sopuli.xyz 2 points 1 day ago (2 children)

Show me a non-directional antenna.

[–] Lv_InSaNe_vL@lemmy.world 1 points 4 hours ago

Omni-directional antennas?

[–] ChairmanMeow@programming.dev 1 points 4 hours ago (1 children)
[–] zaphod@sopuli.xyz 1 points 4 hours ago

Just because you call it non-directional doesn't mean it is. They all have gain compared to a theoretical isotropic antenna.

[–] wander1236@sh.itjust.works 9 points 1 day ago (1 children)
[–] WhatAmLemmy@lemmy.world 5 points 1 day ago

It's almost too easy

[–] neatobuilds@lemmy.today 13 points 1 day ago (1 children)

I use about 800mW for my fpv drone and if you get a little bit away from yourself and go behind a tree or something you could lose video pretty easily

[–] recklessengagement@lemmy.world 3 points 1 day ago (1 children)

Wonder what the latency would be like trying to fly my 3.5" on the moon from earth

Although I suppose the lack of atmosphere would be the bigger issue...

[–] Morphit@feddit.uk 2 points 1 day ago

Think of the speeds you could fly at with no drag! I'm so bummed that the Grace Hopper drone didn't get to fly after Intuitive Machines fluffed their second landing. That would have been awesome outreach from NASA.

We want drones on the moon!

[–] lnxtx@feddit.nl 14 points 1 day ago (1 children)

My Bluetooth buds often get interference - technically 100 mW, distance from my head to a pocket.

[–] moody@lemmings.world 8 points 1 day ago

technically 100 mW

Technically a maximum of 100 mW, but realistically much lower than that.

[–] yesman@lemmy.world 6 points 1 day ago (1 children)

To be fair, that's an insignificant distance for light to travel.

[–] 7eter@feddit.org 7 points 1 day ago (1 children)

Still takes at least 2 seconds for the round trip.

[–] yesman@lemmy.world 6 points 1 day ago (1 children)

Well, according to my ex, even 30 or 90 seconds is an interval unworthy of consideration.

[–] RubberElectrons@lemmy.world 3 points 1 day ago* (last edited 1 day ago) (1 children)