this post was submitted on 13 Mar 2025
258 points (98.9% liked)

Science Memes

13218 readers
1800 users here now

Welcome to c/science_memes @ Mander.xyz!

A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.



Rules

  1. Don't throw mud. Behave like an intellectual and remember the human.
  2. Keep it rooted (on topic).
  3. No spam.
  4. Infographics welcome, get schooled.

This is a science community. We use the Dawkins definition of meme.



Research Committee

Other Mander Communities

Science and Research

Biology and Life Sciences

Physical Sciences

Humanities and Social Sciences

Practical and Applied Sciences

Memes

Miscellaneous

founded 2 years ago
MODERATORS
 
all 29 comments
sorted by: hot top controversial new old
[–] Yorick@sh.itjust.works 99 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 72 points 1 day ago (1 children)

Also, directional vs omnidirectional antennas.

[–] facepainter@lemm.ee 42 points 1 day ago (1 children)

This is the most important part.

[–] deadbeef79000@lemmy.nz 19 points 1 day ago (1 children)

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

[–] meyotch@slrpnk.net 16 points 1 day ago

One bit! That’s all you get!

[–] Hugin@lemmy.world 36 points 1 day ago

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

[–] 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 20 points 1 day ago* (last edited 1 day ago) (1 children)

I am worried about 2000ms ping

[–] Rhaedas@fedia.io 6 points 23 hours 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!

[–] neatobuilds@lemmy.today 12 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 23 hours 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 22 hours 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!

[–] zaphod@sopuli.xyz 25 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 1 hour ago

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

[–] Zwiebel@feddit.org 9 points 1 day ago (1 children)
[–] zaphod@sopuli.xyz 2 points 22 hours ago (2 children)

Show me a non-directional antenna.

[–] Lv_InSaNe_vL@lemmy.world 1 points 1 minute ago

Omni-directional antennas?

[–] ChairmanMeow@programming.dev 1 points 52 minutes ago (1 children)
[–] zaphod@sopuli.xyz 1 points 31 minutes 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

[–] lnxtx 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 22 hours ago* (last edited 22 hours ago) (1 children)