Rocket scientists be like:
Fuel efficiency: seconds.
Acceleration….
Sounds like that reduces to hertz, which I’m sure they’ll just express in seconds.
They like to set the speed of light to be 1. That is dimensionless 1. It makes their calculations simpler this way instead of dragging some power of c everywhere like a loosely connected trailer on a dirt road.
When i took a particle physics class we measured everything in energy (eV). In this case of measuring everything in seconds, acceration would be measured in units of 1/s
Please Sir, can I have some more?
Lash him! Ridicule him! This boy wants seconds!
Why is the astrophysicist wearing gloves? Is he trying to dispose of a body?
You don’t want to know what an astrophysicist does in their free time.
Well the one I knew spent his free time doing community theater, having many of the women there go crazy over him (he was good-looking and charming), and then not sleeping with any of them because he was a wait-until-marriage religious guy. I don’t think he was typical.
I intended to be an astrophysicist before finally settling on IT, and I was doing theater before life did its things and I had to stop. I’m kinda religious but not THAT religious (and my SO is an atheist so, really not THAT much).
Maybe there’s kind of a type anyway.
removed by mod
Me: not smart enough to understand
Brain: Quick! Say something to sound like you fit in!
Me: uh … I just did the Kessel Run in under 12 parsecs!
But do you remember the Krebs Cycle?
That may be relativists (they would actually measure anything in units of mass, with everything else defined through G = c = 1). Astrophysicists commonly measure mass in solar masses, long distances in parsec (or kiloparsec, megaparsec), short distances in solar radii or AU, and time in whatever is relevant to their problem (could be seconds or gigayears)
short distances in solar radii
I think astrophycisists and I may have a difference of opinion on the meaning of the adjective short
I don’t know anybody using just seconds. I use natural units and my simulation buddies use their funny cgs units.
Angle: seconds
Dessert: seconds
Motion: seconded
Breakfast: second
Hotel: Trivago
That’s elevensies.
¿Porqué no los dos?
Es un chiste que existe solamente para hacer una referencia al señor de los anillos.
Mass in seconds? How? I get mass in Joules, but seconds?
The amount of time a mass M attracts a unitary sphere up into CoM.
There are two possibilities I can think of:
- Orbit duration can be used to calculate mass
- The diameter of a star or the parallax distance on the sky (in arcseconds) can also be used to evaluate mass
Size doesn’t say much about mass though.
I thought stars of similar masses were also of similar sizes. They’re not?
I’m no astrologer but from what I’ve learned, we also need to look at the color to glassify stars into categories. It varies a bit though in each category so it’s a blunt tool.
Then there are other objects like gas clouds and even galaxies. For those, we have no idea of the density distribution, so radial size gives us even less info.
I measure the mass of my stool by seconds it takes to discharge
Well the modern definition of a kg is based off of the second and the metre https://en.m.wikipedia.org/wiki/Kilogram :P
If you ever find yourself among theoretical physicists and/or astrophysicists and need a conversation starter, just ask about unit systems or unitless/natural measurement systems. There is no other profession that is more obsessed about that topic.
Just to put this here:
ħ=1
.
As a theoretical physicist, units are for chumps
It’s easy to remember c and ℏ if they’re both 1…
Constance? Never heard of her
You must love Reynold’s Number:
Oh god, no fluid mechanics is way too difficult. I stuck to studying quantum effects of black holes, which is much easier.
(This isn’t a joke, it’s literally true)
angle: seconds
Rads. But radians are fine too.
Tau (τ). A full circle is just 1τ instead of 2π.
Yeah, but everything else is more annoying. 1+e^i(0.5τ)=0 just doesn’t hit the same
Euler’s identity with tau simplifies to:
eiτ = 1
So it’s actually simpler. See: https://tauday.com/tau-manifesto#sec-euler_s_identity
Sure, it’s simpler; but it’s less elegant
Don’t they measure distance and time by redshift (ie colour)
What even is color if not seconds^-1?
Yeah true, but I think they actually use wavelength of red shift, which is distance… traveled by light in the time it takes to make a full cycle. So I guess we’re back to seconds again.
I think they use this for distance and time because at scales being dealt with they have the same implications.
They normally use parallax-seconds, i.e. parsecs, for long distance objects.
I think you need to be more specific than ‘long distance’, yes they use parsecs for ‘long distances’ but I believe only for intra-galactic objects. I think other galaxies are too distant for parallax seconds to be useful.
Fair!
Thanks for this bit of clarification
