Cosmic Redshift Puns

If I understood correctly, the CMB originated at a time when the universe was much hotter and denser than today, and originally consisted of photons of much shorter wavelength than today. As the universe expanded and cooled, the photons comprising this background radiation did too, and at present it appears to us in the microwave range of wavelengths.

I don't understand how the law of conservation of energy holds for the total amount of energy carried by the CMB. The number of photons comprising the CMB can't increase. It can only remain the same or decrease (some photons will get absorbed by matter), and their wavelength is continually increasing. The total amount of energy carried by the CMB should therefore decrease (photons will longer wavelengths have less energy). If energy is conserved, where did this energy go?

When light travels cosmic distances, due to expansion of the universe it’s wavelength increases, wouldn’t this cause the photons’ energy to decrease as well as its momentum? These are conserved quantities, where do they go? What receives the energy and momentum lost from the photon? This has been puzzling me for a while now

The cosmic background radiation temperature has been measured to be uniformly ~2.7 K. Doesn't this contradict the equation stating that the CMBR temperature at some redshift z is equal to ~2.7 * (1 + z)? I believe the universe is redshifted more at farther distances, so wouldn't this mean that the CMBR temperature increases as you go farther out in the universe and therefore isn't uniform?

It's just something I need to clarify from the people of this sub. Due to the Doppler Effect and the expansion of the universe, the data transmission from the distant satellites are getting stretched, just like star-light. So, due to the resulting redshift, should the radio waves be also redshifted ?? I mean, the wavelength should also increase, right ?? So, how is it that the telescopes of the earth catch them, with their variable wavelength ?? I hope I could explain my point. Please comment.

I've been trying to understand why redshift happens. The closest I've got so far has been through the help of this video: How Relativity Redshifts Light - The Relativistic Doppler Shift

So as I understand things: The energy a particle or wave of light is apparent from its wavelength (as light will always travel the same speed regardless of how much energy it has), and this wavelength is simply the frequency of oscillations in a point on the electromagnetic field.

But, because space is expanding, and because of an observer moving away from the lightsource, the crests of these oscilations are perceved as less frequent by an observer seeing redshift.

Does this mean that redshifted light really has the same amount of light as it did billions of years ago, and it only looks like it has less energy because of this phenomenon?

Is this also true of the cosmic microwave background radiation? And that that radiation still possesses the same amount of energy as it did roughly 14 billion years ago, and its only just been redshifted all the way down to microwave levels, so it only looks like it has less energy?

Or have I got it backwards, and redshift is physically decreasing the energy of these light waves? If that's the case, where does the energy go (conservation of energy and all that)?

Finally, Wikipedia says in its opening section that redshift is caused by three things: The two I've already mentioned (the expansion of space and a moving observer), and the observer being in a less curved region of spacetime than the lightsource. Am I right in assuming that this cause is basically due to the same thing is the first cause, the expansion/contraction/shape of spacetime?

Thanks in advance!

Edit: Spelling

We've had some notable astronomical events in the last few years, and two really really stand out -

1 The Oumuamua object (constellation Lyra)

2 The strange light dimming of Tabby's Star (constellation Cygnus) consistent with a large increase of mining activity (as one explanation)

And either one of these would be interesting enough, but for the fact that they both come from the same general area of the sky, especially as Oumuamua's exact origin can't be calculated with precision, its origin is quite possibly consistent with the location of Tabby's star, or they could be connected in some way.

If this James Webb is pointed at polar North this would to my mind be an intriguing target for it to check out.

Let's look at what the scope does, and why that might be relevant -

https://en.wikipedia.org/wiki/James_Webb_Space_Telescope

>the JWST will observe in a lower frequency range, from long-wavelength visible light through mid-infrared (0.6 to 28.3 μm), which will allow it to observe high redshift objects that are too old and too distant for Hubble to observe.

The mid infra-red looks like its ideal to detect technological signatures such as of the Dyson sphere sort, and maybe examine for watery planets.

If space industrialisation is occurring around Tabby's star and it's recent, it might suggest expansion.

Why is industrial mining considered an explanation for the strange dimming of Tabby's Star? This thread examines this;

https://www.reddit.com/r/IsaacArthur/comments/pldg4i/another_lightcurve_dip_observed_with_tabbys_star/

And this video, gets into mining around the 19 minute mark.

https://youtu.be/soy-_N-9UpY?t=1127

What wavelengths are relevant here for spotting industrial activity or cities on alien planets;

http://www.icc.dur.ac.uk/~tt/Lectures/Galaxies/Images/Infrared/Windows/irwindows.html

http://www.icc.dur.ac.uk/~tt/Lectures/Galaxies/Images/Infrared/Regions/irregions.html

>Mid-Infrared
5 to (25-40) μm
(92.5-140) to 740 degrees Kelvin
What we see;
Planets, comets and asteroids
Dust warmed by starlight
Protoplanetary disk

I was wondering what would happen in a scenario like this. Once a photon gets enough energy it turns into a matter antimatter particle pair, and when you move in the direction of something that ejected a photon, that photon blue shifts for you to keep the speed of light constant, gaining energy. So what would happen? How could it be a particle pair relative to you, but a photon to an outside observer?

I don't want to step on anybody's toes here, but the amount of non-dad jokes here in this subreddit really annoys me. First of all, dad jokes CAN be NSFW, it clearly says so in the sub rules. Secondly, it doesn't automatically make it a dad joke if it's from a conversation between you and your child. Most importantly, the jokes that your CHILDREN tell YOU are not dad jokes. The point of a dad joke is that it's so cheesy only a dad who's trying to be funny would make such a joke. That's it. They are stupid plays on words, lame puns and so on. There has to be a clever pun or wordplay for it to be considered a dad joke.

Again, to all the fellow dads, I apologise if I'm sounding too harsh. But I just needed to get it off my chest.

Alot of great jokes get posted here! However just because you have a joke, doesn't mean it's a dad joke.

THIS IS NOT ABOUT NSFW, THIS IS ABOUT LONG JOKES, BLONDE JOKES, SEXUAL JOKES, KNOCK KNOCK JOKES, POLITICAL JOKES, ETC BEING POSTED IN A DAD JOKE SUB

Try telling these sexual jokes that get posted here, to your kid and see how your spouse likes it.. if that goes well, Try telling one of your friends kid about your sex life being like Coca cola, first it was normal, than light and now zero , and see if the parents are OK with you telling their kid the "dad joke"

I'm not even referencing the NSFW, I'm saying Dad jokes are corny, and sometimes painful, not sexual

So check out r/jokes for all types of jokes

r/unclejokes for dirty jokes

r/3amjokes for real weird and alot of OC

r/cleandadjokes If your really sick of seeing not dad jokes in r/dadjokes

Punchline !

Edit: this is not a post about NSFW , This is about jokes, knock knock jokes, blonde jokes, political jokes etc being posted in a dad joke sub

Edit 2: don't touch the thermostat

Do your worst!

How the hell am I suppose to know when it’s raining in Sweden?

Ants don’t even have the concept fathers, let alone a good dad joke. Keep r/ants out of my r/dadjokes.

But no, seriously. I understand rule 7 is great to have intelligent discussion, but sometimes it feels like 1 in 10 posts here is someone getting upset about the jokes on this sub. Let the mods deal with it, they regulate the sub.

They were cooked in Greece.

I'm surprised it hasn't decade.

Don't you know a good pun is its own reword?

Two muffins are in an oven, one muffin looks at the other and says "is it just me, or is it hot in here?"

Then the other muffin says "AHH, TALKING MUFFIN!!!"

Now that I listen to albums, I hardly ever leave the house.

The Human bar built into the derelict freighter at the Galactic Testing Grounds above the galactic plane was abuzz with the typical Tuesday night shenanigans.

Zaphod was there, in his specially made lounge chair (he had a rather, atypical physique- 2 heads, 3 arms and all), quite intoxicated, looking around at the Humans, with a slight smile on his faces. He liked these primitive Humans. They reminded him of old memories, of early struggling times of experimentation and discovery, theory and understanding. These Humans were at the peak time of science and engineering- when they did not yet know everything, and were hungry to learn and know more. It was a 'sweet spot' of eagerness that Zaphod found nostalgic and endearing.

A conversation between two sciencey-types caught his attention.

"The End of the universe has to be the Heat Death- everything expands out, gets more isolated, fades away to dark cold empty." One of them said.

"Naw, the End is going to be the Big Rip before any of that happens- the expansion will accelerate until down at the atomic level the expansion is so fast that fundamental forces can no longer keep up, and rrrRRIP!"

Zaphod chuckled. "Hah! It's funny how you're both wrong. Well, what's funny is that one of you is kind of right, but got it wrong for the same reason the other guy is wrong. Now that's a punchline!" Zaphod could appreciate poetic irony when it hit him.

The two humans looked to Zaphod, and shared a quick sideways glance at each other. "How can one of us be right but still wrong for both of us? You aren't making any sense, Zaphod"

"Well, ya see, heres the thing... hmm.. maybe I shouldn't tell you guys this... I mean my Overseers are already looking at me with suspicion. I probably shouldn't casually undermine all your scientific 'discoveries' any more than I already have... aw screw it! What can anyone do with the knowledge of the End and the Big Picture? H-hey.. why did the music cut out?"

The Jukebox always seemed to turn off when Zaphod was about to do some Serious Explaining. He never quite caught on.

"So, which one of us was right?"

"Aach! Now what fun is there in THAT?! No, ill tell you what you both got wrong, and you can figure out the winner that way."

Zaphod took a long drink from his 'Pan Galactic Gargle Blaster', before beginning his lecture.

"See, its the expansion thing. That's wrong. Nothing is expanding, certainly not accelerating. Well, there is a bit of expansion, but that is just t

For context I'm a Refuse Driver (Garbage man) & today I was on food waste. After I'd tipped I was checking the wagon for any defects when I spotted a lone pea balanced on the lifts.

I said "hey look, an escaPEA"

No one near me but it didn't half make me laugh for a good hour or so!

Edit: I can't believe how much this has blown up. Thank you everyone I've had a blast reading through the replies 😂

It really does, I swear!

And now I’m cannelloni

Because she wanted to see the task manager.

But that’s comparing apples to oranges

And boy are my arms legs.

Heard they've been doing some shady business.

but then I remembered it was ground this morning.

Edit: Thank you guys for the awards, they're much nicer than the cardboard sleeve I've been using and reassures me that my jokes aren't stale

Edit 2: I have already been made aware that Men In Black 3 has told a version of this joke before. If the joke is not new to you, please enjoy any of the single origin puns in the comments

BamBOO!

They’re on standbi

A play on words.

My daughter, Chewbecca, not so much.