this post was submitted on 20 Jan 2026
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I was watching a SciFi tv show where large objects had an outer speed limit of 18000 kph and that got me wondering what things in everyday life are faster than even 500 kph.

I know bullets can be fast, but they are not exactly everyday life (at least in my life).

I included mass for obvious relativistic reasons.

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[–] trolololol@lemmy.world 4 points 3 months ago (1 children)

Rockets?

International space station goes around the earth at about 7km/s if I recall correctly. And it's quite big.

That's the kind of speed of any rocket going to meet with ISS or being put into earth orbit. Things reentrying from orbit hit the atmosphere at about that speed too.

Things going or coming to the moon need slightly more, I think ballpark is 10km/s, and above that you're travelling to Mars, asteroids, Venus, Jupiter, etc etc.

[–] PeriodicallyPedantic@lemmy.ca 3 points 3 months ago (2 children)

I feel like that's even less like "everyday life" than OPs example of bullets lol

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[–] crystalmerchant@lemmy.world 4 points 3 months ago (1 children)

With mass? In my everyday life? Cars, clearly the winner. I can't think of a more massive object moving at speed that I engage with every day.

Other than that.. Maybe airplanes? I fly once every 1-2 months or so.

[–] yardy_sardley@lemmy.ca 3 points 3 months ago (2 children)

Planes are a good answer. Commercial jets normally fly at about 900km/h.

Also satellites. Something in low earth orbit like the ISS or a starlink node would be going about 8km per second.

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[–] deHaga@feddit.uk 4 points 3 months ago

Concorde was supersonic

[–] kreskin@lemmy.world 3 points 3 months ago* (last edited 3 months ago)

radio waves dont have mass but do have relativistic mass. And you didnt clarify whether relativistic mass counted, so I'm going to go with radio waves. They travel at the speed of light. I am the winner. I'd like my nobel prize in literature now.

[–] diabetic_porcupine@lemmy.world 3 points 3 months ago

There’s a dirty joke in here somewhere

[–] Rai@lemmy.dbzer0.com 3 points 3 months ago

Me, at the end of any social engagement.

It’s like that episode of Simpsons where they’re filming something at the Simpsons’ house and Homer learns there’s snacks. He suddenly becomes a Homer-shaped cloud of dust.

[–] NigelFrobisher@aussie.zone 3 points 3 months ago (1 children)

Every mass is moving really fast from a certain point of view.

[–] exasperation@lemmy.dbzer0.com 2 points 3 months ago

Well then you are lost!

[–] ZeroGravitas@lemmy.dbzer0.com 2 points 3 months ago (2 children)

A skydiver's terminal velocity is about 90m/s (320km/h). Going beyond that requires propulsion.

Otherwise a visit to Japan or China might serve, Maglev trains can reach speeds in excess of 600km/h.

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[–] Kolanaki@pawb.social 2 points 3 months ago

Me when someone hits me up for a booty call.

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