What Time Is It on the Moon?
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- Опубліковано 5 вер 2024
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If all goes well, we'll be sending astronauts back to the Moon in just a couple of years. And scientists have a lot to figure out before then, including the answer to a seemingly simple question: What time is it up there?
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The local Lunar time should be called the Lunatic
And moon seconds should be replaced with Luna-Tics ...
@@CybAtSteam Perhaps make it Luna-Tocs, otherwise it might be to confusing, a whole day might then be a Luna Tic-Toc
😄
I always thought Lunatics is what we would call citizens of the Moon.
Oh my you need to get a new career. Give up on comedy.
Do we finally get to say: Star Date?
But what time standard does Starfleet follow? San Francisco, Paris (France), or UTC? 🤔
@@AlyssaNguyen Galactic standard time.
@@TheRealSkeletor In which galaxy? 🧐
The concept of the stardate is that it's not dependent on where you are. Whether you're in San Francisco or on the Moon, or halfway to the center of the galaxy, the stardate is the same. That's the point.
@@matoatlantisUm, the one we're in, obviously?
happy moon landing day! around 55 years ago, the first human landed on the moon!
I got to stay up late to watch
Or did they? hahahaha.
@@sirensynapse5603 A pox on you for lighting that fuse. Lol
Great achievement at the time. Brilliant scientists and engineers, and very brave astronauts!
@@sirensynapse5603 They lost the 55 years old samples and asked china for it.
I'm a _huge_ metrology (the science of measurement) and horology (the science of timekeeping) nerd, and this is *_AWESOME!!_*
Horology is a word I learned from pirates of the Caribbean.
*_awesome_*
@@hamaljay 🤣😻
"What time is it?"
"Time to get a new watch."
Fun fact: Seem strange that "Coordinated Universal Time" is called "UTC" and not "CUT"? That's cause, along with the French "Temps Universel Coordonné" (which would have been "TUC"), "UTC" was chosen as a compromise to be the same abbreviation for all languages.
"Universal Time, Coordinated" There, fixed it.
@@thatjeff7550 But it's not broken. UTC is short for "Coordinated Universal Time". Much like "Wi-Fi" is short for "Wireless Networking". It's not an acronym; it's an abbreviation.
@@robspiess "Wireless Fidelity".
@@NiffirgkcaJwe fee 🎉
As a software engineer, I support violent resistance against the addition of any new time zones. My life would be so much easier if everyone just used UTC.
As they should, hence the Universal in the abbreviation :D
(Satellite flight software engineer here) But you can't. Even atomic clocks will not tick at the same rate on the moon due to relativity. You will always have to have correction or correlation factors, and trust me, it gets MESSY. One of the simple spacecraft I worked on (Earth Observing 1 aka EO-1) had 14 different definitions of time / correlation factors. There's no easy answer...
There's a good point to be made regarding that, but then you'd get accusations of imperialism from literally every single nation that is too far away from UTC, who have been working in the morning and sleeping at time, that now have a work schedule that is, like, sleeping during daytime and working at night, but not because they would actually flip their works schedules, over, but because you'd call daylight the time without sunlight and night the time with sunlight. No one would like that, so a unified UTC would absolutely never work outside of Europe and we all know that the Europe has very little influence power in the international stage. This is not the Victorian era.
So, interesting proposal, but it would never work.
Just see the whole bevy of issues that the people in western China have to face: all of mainland is in a single time zone. In the west, their sun time and legal time are like up to 4 hours out of whack, to the point the the people in Xinjiang have devised their own local time (which the CCP hates and tries to discourage) because people need to be able to use clocks that make sense with their normal life schedules.
@@faenethlorhalien why cant people just learn to divorce the position of the sun in the sky from the time it says on the clock
@@faenethlorhalien why does it matter what number it is when you wake up and go to bed? to be clear, i'm on eastern time, so the accusations of imperialism aren't gonna stick to me (at least not with regard to using UTC)
They should probably change Coordinated Universal Time to Coordinated Earth Time if they are going to expand to other planets.
Thanks for explaining! Your channel motivates many people to become scientists, even at the lowest level, it makes a difference.
And even helps educate everyone else on science (especially as there is endless misinformation out there).
Matt O'Dowd has trained me that when the word "spacetime" get spoken, the video is about to end. Not here!
If we went by cycles of “day” and “night” like on earth, the Moon takes a whole month to complete one rotation. This means that lunar day and night are each about two Earth weeks long. In that way, moon time would be very slow!
or each day has like a lot of hours
@@callyral 655.72 hours long! 😱
@@onlybecauseoftime😂😂That clock would be difficult to read😂😂
Is anyone else excited for humans' return to the moon?? I'm totally jazzed about this
Me too coz this time we would have a much real proof and given the quality of camera censors these day it would great to see how it actually looks like. 😮
It serves no purpose whatsoever
for sure, it seems to me the moon makes a lot more sense than mars
My indifference is immeasurable.
@@rebokfleetfootwell yes as we have a lot of junk left there to clean up
A martian time standard is easy. It's only a little different from earth so you simply add 37 minutes to the normal 24 hour clock and just let people get some extra sleep.
Ha! Do you really think they'd allow people to sleep for 37 more minutes? You seem not to understand how (sadly) capitalism works: they'd be force to work 37 more minutes for no extra pay.
I would move to Mars if it means I can get 37 minutes of extra sleep each day ☺️
The length of a day is fine, but there are still dilation issues to consider. Mars is less massive than Earth, and moving at a different velocity.
I think if I could sleep for a lunar night I'd finally feel rested
In a 1911 lecture, Einstein defined a procedure for creating a self-consistent definition of time in a large volume of space: Select a single unaccelerated clock as your master clock. Next, position (or find) identically constructed clocks throughout a large volume of space while ensuring those clocks remain motionless relative to the original clock. His final step was to do a "handshake" synchronization of those motionless clocks with the original master clock, with lightspeed delays considered.
The result is a large volume of space instrumented with clocks that share the same initial dial settings and tick at the same rate. Einstein's point was remarkably practical since he noted that until you do this procedure using physical (versus abstract) clocks, the interchangeability of space and time makes it impossible to find an unambiguous set of space and time coordinates for any event relative to the master clock. He noted that a physicist can only collect meaningful data once implementing some version of this procedure.
For systems _not_ at rest relative to your master clock, Einstein required you to read their times only when they pass by and "touch" one of your previously synchronized clocks. This direct contact is vital because it eliminates space-time ambiguity. It is, for example, why particles in accelerators always show time as passing slower since the entire accelerator is synchronized to the clocks of physicists.
Notably, this procedure guarantees that _all_ clocks moving relative to the master clock show time passing slower than the master clock and its subordinate clocks. This causes no temporal paradoxes because two parameters are in play, not just one: How fast the moving clocks tick off time, which is always slower than the master clock, and the time setting (dial positions) of the moving clock, which increases with distance traveled.
Thus, if you travel to the Andromeda galaxy close to lightspeed, every clock you pass along the way ticks slower than yours. The catch is that the current time setting of each such clock _changes_ as you travel forward through space. Thus, if you travel to the Andromeda Galaxy, every clock you encounter at rest relative to the Milky Way or Andromeda runs at a snail's pace relative to the clocks in your spaceship. However, you also notice that the farther you go, the farther into the future these clocks appear to be set. By the time you reach your destination, every slow clock you encounter is set 2.5 million years ahead of the clocks in your ship, so a delay of a second or two due to the Andromeda clocks running slower makes very little difference.
This _age gradient_ effect only appears when smaller groups of Einstein-synchronized clocks move through vastly larger sets of previously synchronized clocks. Both tiny particles within huge accelerators and tiny spaceships traveling between galaxies meet this criterion and thus encounter age gradients as they travel. Such age gradients also explain the twin's paradox since one twin stays in the larger clock frame and thus encounters no forward resetting of time per light year traveled.
Since this was before General Relativity, Einstein did not address the impact of gravity on defining a singular time standard. The main effect of adding gravity is to force the use of clocks that do _not_ tick a the same rate. For example, suppose your master clock is on Luna. In that case, its subordinate clocks in the deeper gravity well of Earth must run a bit faster than normal to maintain handshake synchronization with the master clock on Luna. The faster-running clocks become a stark warning that gravitational time dilation is not relative in the same fashion as velocity time dilation.
I recommend using Einstein's concept of creating an explicit network of UTC-synchronized clocks, with the addition of variable-speed clocks to account for irreversible gravitational time dilation. All such clocks would treat Earth's UTC master clock as supreme, even if they have to run a bit fast or slow. The second part would be using local-physics-only clocks that track local time. Combined with the UTC clocks, these dual clocks would convert time dilation effects into absolute, non-relative numbers. The Luna UTC master clock would appear to be running a bit slow by Luna standards, while the second Luna Physics clock (which could be virtual, nothing more than a multiple of the UTC one) would give the Luna-rate time needed for physics work.
For travelers, the "it's all relative" non-answer doesn't work and is already not what GPS satellites do. (I keep meaning to look that up. They necessarily use some variant of age gradients, even if only labeled as "corrections" for satellite distance traveled.) A dual system is again needed. A fast-moving spaceship would have a UTC clock time that speeds up as the ship moves faster and a spaceship-frame-only clock that defines its local physics. While this dual-clock approach destroys the mystery of claiming everything is relative, it also makes causality easier to track and displays explicitly when accelerated systems become asymmetrically time-dilated. Age gradients calculate how much time is lost during travel -- that is, how far you move into the future per kilometer traveled.
It's always 4:20 on the Moon.
It's 110F outdoors where I am right now and she's wearing a sweatshirt 😂😂 And then the advert comes on and she's in a jumper! 😅😅
savannah can wear what they want.
I sure hope she doesn't jump.
@@winterwatson6437 They sure can. I was simply pointing out the difference.
It's half past moon.
How do you tell that clocks on the moon are crazy?
Because they lunar ticks
Dawes: How old are you?
Diogo: Nineteen, I think. Earther years.
Dawes: Even our sense of time comes from them.
“The time it takes the Earth to spin around its axis, the time it takes the Earth to go once around the sun. On Jupiter, you would be celebrating your first birthday. It’s hard to feel we matter out here, isn’t it?”
We use UTC (or GMT or Zulu) in aviation almost exclusively. If it's 0500Z in NY it's 0500Z in Melbourne. It's really simple and makes plenty of sense.
There is such a strong case for using UTC. Almost every human alive or has ever lived, spends and spent their entire lives on Earth. And we evolved in a 24h day regime. Nowhere else does a 24h day correspond to any celestial time standard. So there is a case for a local time on each planet or other body, relative to some celestial phenomenon like day and night on that body, just like we have local time zones around the Earth corresponding to the day-night cycle here, and a universal time for synchronising events between bodies. The latter makes sense to be UTC, and can be derived by exchanging time signals between Earth and the body rather like computers do with the Network Time Protocol (NTP) on Earth. Except allowance would have to be made for light travel time. Either distant bodies lag by their light time from Earth (so events are considered simultaneous when a light signal passes between them), or the distant body is delayed by their light time from Earth, caving to the illusion of simultaneity in Classical physics.
If the sending and receiving of signals are considered simultaneous, regardless of direction, then that would make “considered simultaneous” not a transitive relation.
One could set the time coordinate there to be the time coordinate here of when the latest signal from here to reach there, was sent, I guess.
The problem isn't the day/night cycle (except on Mars, where a sol is close enough to a day for there to be a strong motivation for time of sol rather than time of day at Greenwich).
And the problem isn't separation; two observers in the same inertial frame have the same time.
A small part of the problem is relative motion.
But the main problem is acceleration, in particular the extended periods of time when a clock is at one other than earth gravity.
Like she said, if you sync your clock to UTC at 00:00:00.00Z, then when 00:00:00.00Z rolls around again on earth, it's now 00:00:00.0000587 on the moon.
How do you deal with that?
this sows the seed for a lunarian revolution against their terran overlords.
Given the title question this really should have opened with the Vsauce music
It doesn’t seem so difficult….
Since we know the difference between moon and earth time “velocity” (for want of a better term) just apply the conversion factor.
It will require an atomic clock in order to have time measurements accurate enough for it to make a difference anyway, so to me it seems very straightforward.
What am I missing?
This is totally off the cuff and without looking anything up, so huge "grain of salt" warning: if the orbit of the moon is not a perfect circle, then the relative speed would change with respect to earth. The moon would be traveling faster at the nearest point of its orbit (periapsis) than the farthest point (apoapsis). The period of the moon's orbit is about 28 days, so it would flip flop from slightly faster to slightly slower every 14 days. This might change the calculation enough that a flat time adjustment isn't enough, but I don't know what the tolerance range is for space maneuvers😅
You can't change the value of the second.
I think what you're proposing is to keep the clocks on the moon synced to the earth second-by-second.
To do that you'd have to have a lunar second that was different than the earth-standard second (applying your conversion factor).
Maybe that is part of the solution, but it means that you have to distinguish clocks that measure duration (ticking in SI seconds) from clocks that read out time of day (ticking in local seconds).
So what are the protocols for keeping track of which second is being used, given that the easiest way of measuring duration (in a computer program) is to record the start and stop times and subtract?
"Since we know the difference between moon and earth time “velocity” (for want of a better term) just apply the conversion factor. "
That's the thing, there isn't one. Ever wonder why leap seconds are only added sporadically, and not on a set interval? Because unpredictable factors exist. We can't predict what the core is going to do to affect the Earth's rotation, what the tides will do to affect Earth's rotation, how the mass of the Sun will be non-homogenously spread out in the future, etc.
So since we can't predict what changes will need to be made to Earth time, we don't have a conversion factor for time.
Gravity. Time is affected by gravity. And even on earth gravity isn't 100% the same everywhere
@@michaelmicek As far as I can tell that _will_ have to happen, and is one of the problems to work out.
This is an interesting problem to solve!
Since Earthlings will eventually colonize the solar system maybe we should start working on Coordinated Solar Time.
Although time passes slower on the massive Sun than anywhere else in our solar system..
I love the idea of the good news being delivered to my door! I think this is the first time in all of the 1000s of ads I've seen that I actually went and bought something! Looking forward to a year's worth of news! Thanks for the recommendation!
Whenever time dilation impacts everyday activities (like chilling on the Moon!) I get a little excited 🤓
I know computing more than anything else, however i'm deeply obsessed with space and nature.
Why can't we first define what actually a "Time" is in our Solar System? This's my definition of "Time": the subjective use of celestial bodies' cycles (sun, moon, planets etc.), devices like watches and units - in order to label or measure the chronological changes in nature, that due to entropy continually progress only forward - collectively for the past, present and future.
If astronauts would have stayed on the tne moon permanently, then one daylight on the moon would have been roughly 29.5 earth days for them (bcs of earth's shadow cast on the moon). Gravity is related to the sizes and proximity to each other of celestial bodies (bulging & oval shapes considered). Originally, "time" on earth was derived from the sunlight on earth, a "Month" from the moon phases, etc. However, when I visited a forest in Africa (my birthplace) where I was the only one with a watch (or clock), the primitive nomads were able to tell me roughly what time of the night it was by just looking at the position of constellations on the sky (you know earth moves & spins). This's also how ancient seafarers navigated deep on dark oceans at night.
Bonus: I have had an NDE, everything was vividly illuminated but there was no sun or moon, and definitely time wasn't valuable since past, present and future were all happening at the same time bcs life and human senses in the Spiritual Realm were all thought-based! - whatever you think about just shows up regardless of time. Wish to stay in the Spirit World.
Hmmm, what about using pulsars? Pick one that's particularly regular, and count the pulses. Decide on a number of pulses to make a whole measurement (second, day, whatever), then adjust from that to local times. Like say, 20,000 pulses from Pulsar A is one Star Minute, and a Star Minute is X seconds on Earth and Y seconds on the Moon.
Basically, use something outside the system to set the standard, then convert down. That way you can stay in sync while still controlling for time dilation effects
I wonder at what time scale you'd have to take the expansion of the universe into consideration.
Figure each lunar base with > n people will be called upon to have an atomic clock, up until you have a dozen such clocks at a dozen different bases, and coordinate them into LTC, and figure out how to sync it all back to UTC.
I’ve never thought about this before, thank you for educating me!
The time is NOW!
I.... didn't ask this, but now I'm genuinely curious 🧐
Good job sci show :D
This is something I just learned today, when I saw some tidal warnings around the islands of Hawai'i on the NWS site. Apparently they're expecting "king tides", extremely high tides due to the Earth, Moon and Sun lining up (at either full or new moons, it's the full moon tomorrow). Maybe y'all can do a segment on those?
King tides occur at new moon due to the Sun and Moon pulling in the same direction.
Fascinating! I had no idea how complicated this could be. I've been wishing for a return to the moon ever since we stopped going because I think exploring and possibly colonizing the moon and other planets is an important goal we should be reaching for.
I love your art style and I'm glad you have a good heart. I subbed and am making a comment to boost the algorithm!
PS. The BGM was pretty loud. The crackle of a record can sound artsy but can be very overpowering. I had to change the volume a few times to hear you so watch out for that 😁
The difference between clock speeds due to Relativity is about 2ms per month. Light can only travel 600km in that time so the difference in signal latency from one hour to the next with ground control is larger. In the worst case of LEO, it's a 15m delta in position if your clock is that off.
The big problem is local 'day/night' is still a essential part of life on the Moon and Mars and one has a 29.5 day period and the other a 24.5 hour period.
Thank youuuu for your great work it’s amazing to see you in this community 🤩 I like your way of explaining things and it was a great way to start my morning with you 💕 thank youuuu and thank youuuu and have a good day
Fun Fact: The moon landing technically happened on both July 20th and July 21st
Since sunrise to sunrise on the Moon takes about 29 days, UTC would be a good option. Our time zones are based on a 24 hour day which would mot be practical on the Moon. So any activities on the Moon including launches would be coordinated with Earth bound clocks that are measuring time in UTC. There is just over a second difference in communication with Earth so this should be taken into consideration. Seems like an easy solution.
Go Go Sci Show!
6:11 "before 2027" aka we will have dear john and hank by then lol
I think it’s now.
Checking my watch…
Yep. It’s now.
Interesting
UTC for all planetary coordination/communication. Local atomic clock for experiments. No need to re-invent the calendar for it.
LTC should be linked to the original landing site like UTC is linked to paris
Ain't Nobody Got Time Fo' Dat
this time hopefully without daylight savings ...
I’d also be interested in figuring out how to match up this lunar atomic clock with the fact that a “day” on the moon is ~29.5 Earth days
That's not important.
There's only about one place in the solar system where the the length of the "day" matters: Mars.
This might not apply to a lunar or Mars base... but what about "ship time"? Again, atomic clock could be used, and some amount of computer assist for synchronization when it's time for maneuvers. But ship time would be split into shifts, perhaps coming with alterations in light levels to help with Circadian rhythm signaling. It would obviously be local to each vessel, and again not meant for the MOST precise needs, but it could be a useful framework for the everyday "macro" activities such as routine reports, standing watches, etc.
That isn't the hard part, the hard part is the relativity stuff
Yea… idk if Ship Time would be accurate too! If a Ship goes away from Earths gravitational pull wouldn’t Time Dilation come into effect as well? Like as it goes further and further away from the Earth wouldn’t it’s clock be off?
@@VelociJX it would, and in a less predictable way than any planet because it's moving around so much
Fun fact: if a ship were to circumnavigate the earth its time would end up a day off from the rest of the world regardless of the duration of the voyage, simply because the ship's crew would have gone either one more or one less revolution about the earth's axis compared to everyone else. Likewise for any plane that flew around the entire earth. This effect was observed as early as Magellan's circumnavigation back in the 16th century
I wonder how they take into account the day/night cycle on the moon or the rotation of the moon relative to the Sun or Earth when developing LTC, if at all. Because a “day” on the moon could either be described as 24 hours, like on Earth, or as the time it takes to revolve, or go from dawn to dawn.
Liked this video (and as a cat person and computer nerd) also your sweater!
3:42 PM
its hammertime!
I didn't know UTC was so recent! Also the word 'time' doesn't sound like 'time' or a word anymore
Second camera angle wooo wooooo
UTC = universal time coordination?
Moon time! Of course 🤣
"The time is an illusion, lunchtime double so."
currently as of writing this, the moon's near side is facing towards the earth, and the far side is not. hopefully this clears things up
Interesting topic I'd never considered before.
Peanut Butter Jelly Time!!!
So, Just set it to UTC and have a table that accounts for the very little differences in time and adjust accordingly. Every 5 decades a 1 second adjustment is not out of the realms of possibility.
QUESTION: When exactly did east and west flip on the Moon? It's the moment that the Moon was thought of as a place where a person will stand - and see the sun rise in the east and set in the west - rather than an object seen in the sky.
This was an epic moment that seems to be invisible to history.
I enjoy her narrations alot, makes me feel like I'm back in school watching educational TV 🙂.
savannah’s great-they’re definitely one of the best on sci show
Send an atomic clock to the moon? Who would have thought it would be stolen by aliens lurking on the other side of the dark side of the moon?
[thinking] I'm not sure that having an atomic clock on the Moon would help. The issue is time moves faster on the Moon, correct? Or time moves slower on the Earth--whatever. If that's the case, then the time spent for whatever the atomic clock is measuring (radioactive decay, electron vibration, whatever--I'm not a quantum physicist--would happen at the relativistic speed of whatever speed of the gravitational body. So essentially, an atomic clock would be slightly faster on the Moon than compared to its counterparts on Earth.
[more thinking] Yeah, this is a massive problem. My initial thought was, "Why not just set up a communications link to the atomic clock on Earth to keep everything in tune?" but that in of itself has problems due to transmissions taking something like three seconds to bounce between the Earth and the Moon. Frankly, I think the best option is to set up an atomic clock on whatever planetary surface we colonize and just have incoming ships calibrate to whatever local time is.
I heard manned space flight isn't done entirely robotically, which would make a ton of sense, given how many resources could be saved by not having to accommodate humans and that whole "life endangering" thing, to study the logistics of placing heavier objects like missiles in space with objective of militarization of space.
Tracking the passage of time is important, but we on Earth work around a 24 hr schedule for work/sleep/play. Would Moonies also follow the same 24 hr division or would circadian rhythms on the Moon dictate work/sleep/etc? Since the Moon is tidally locked with the Earth, the length of a day is 28 Earth days. Right?
Can i have an example of when this would be needed?
Cheese O’Clock?
interesting problem!
I know there are more important things going on in this video, but I LOVE THAT SWEATER
Easy. It's Moon o'clock!
Time keeping hasn't been a show stopprr for the Voyager probes these near 50 years on. Of course, when it yakes 22.5 hours one-way for a signal to reach the other party, there's plenty of time to contemplate.
They don't care what time it is on earth the way someone living on the moon would.
How is Iceland in the UTC with Britain? There is 1 hour time differens between them... Just a misshap with the map perhaps? 🤔
4.20?
Imagine universal time trying to synch with Coordinated Mercury Time! The relativitistic effects alone...
It’s party time!!!
As a financial software developer boy do I have opinions on yet another time standard.
58.7 microseconds is super important in the stock market between Earth and the Moon.
this blows my mind and it would make my family think it’s all gods plan😂
Why do they move the c to the back of utc when Coordinated Universal Time should be cut lol
Well, I think that depends on what your definition of "is" is.
Can't we use pulsars as a cosmic time standard? Also won't the UTC need to be renamed "ETC" (Earth Time Standard) to avoid extra confusion?
Something that WILL matter to astronauts in the immediate and be impossible not to notice is that one lunar days is a month long. What studies have been done to test the mental and medical effects this has on humans? And of course there's that pesky communication delay due to the limitations of the speed of light.
But what is the significance of the passage of time?
It's always bedtime on the moon
What is the point of having extra precise atomic cloks when we have to adjust them based on Earth's rotation? Wouldn't be better to base the universal time on the Earth's rotation directly?
Take the hours in a day, divide by the number of time zones, times number of days to get to moon...you'll get the moon time time...for example: 24 hours on earth for 24 time zones...24/24=1x average 3 days to get there...3:00! The side facing us would be daytime, or 3pm (day)...'dark side' would be 12 hours later,or 3:00am. **We see half the moon,other half is in 'dark'....based on earth hours of 24,half is 12...so 'light side is 'daytime', 'darkside' is 12 hours opposite ('darkhalf'! 😆😆. That would be 'base time's...each hour you are in orbit or on lunar surface, is the added time of the moon, up to 12 hours, then repeats because the moon is 'technixally' tidally locked! 😆
Where do I get that top?
Didn't the band Chicago ponder a similar problem back in 1969?
just say "its noon" and call it a day
Time dilation based on relative speed never makes sense to me. If time moves slower for them because they are moving relative to you, wouldn't time also move slower for you because you are moving relative to them?
Nice! This was very informative and entertaining, as always ❤
Can we call our new celestial timekeeping system the Stardate, please?
i subed to goodgoodgood
Depends on the part of the Moon
If more celestial bodies begin getting time standards, does this mean that eventually, UTC will be renamed to ETC?
Reminds me of The Martian were they counted days as Sol
Whoa dude like...what time is it on the moon?
How much gold could you hold in an elephants ear
How much can an elephant lift? If you asked them to lift a dumbbell
In Isaac Asimov's future universe people are still using Earth's 24 hour clock regardless of where they are. This even after Earth has been abandoned and no one knows where it's located anymore.