Відео

The thing with the Oort cloud is, even if it contains a trillion objects it's so large that you could probably fly through it and never even see one. Let's assume 10% of those are aircraft carrier sized or larger. That leaves 10 billion of them (1E11). A sphere with a radius of 55,000AU has a volume of 2.333×10^39 cubic kilometers. The inner sphere of 5000AU radius has about 1.753×10^36 cubic kilometers, that leaves 2.331247×10^39 cubic kilometers. Divide that by the number of objects, you get one object per 2.331247×10^28 cubic kilometers. Each of these aircraft carriers has a sphere with a radius of 11.85 AU to himself, on average. Jupiter's orbit has a radius of about 10.39 AU, good luck spotting an blacked out aircraft carrier somewhere inside the orbit of Jupiter...

Indeed the supreme resource in terms of educational astrophysics content on UA-cam. Live long and prosper.

Is it possible for any common man to follow this? I try but..

Great educator

Actually, it was Compton scattering causing redshift: ua-cam.com/video/mopFag2T7yI/v-deo.htmlsi=tO5Q3QOwEPSmViJD And refraction as I have shown.

184th

I like the music

What a facinating and deeply enlightening explanation of the subject of gravitational lensing and the multiplicity of observations and calculations that have helped build up our understanding of the universe

Glad to see your posting new content…. I’ve been a huge fan since your first videos!!!!

39:07 the higgs was confirmed using one proton collision?

The ring down is mainly due to bandwidth limit of the detector, can you do that math? No, for sure not

Mr. Butler has produced a great gift to humanity and we are thankful for the time and sweat you put in this masterpiece.

Fascinating!

I’ve gotta say, this Is very fascinating! Great production And presentation. Thank you!

WHERE WERE YOU?!

The best channel on here

I've been watching your videos for a few years, I love when you post long videos with calm and clear explanations, thank you for taking the time to create them. I admire you a lot. a hug from Brazil.

great narration

amazing

WOW! You're back! Excellent 👍

Thank you

If we someday develop the technology to warp space time to travel the distances to these galaxies, how do know if they are actually still there? Hundreds of millions of light years was a long time ago

When I was a child in the early 80s we used to get information rich, non patronising science documentaries on the BBC all the time. Nowadays it's all pop science with emphasis on the celebrity, often a scientist, presenting it. Thank goodness for Mr Butler for his scientific content.

What a slap in the face of us flat earthers/ether theorists!!! We could have ether matter vibrations from space, but it could also be earth's vibrations. Earth's vibrational noise is way higher than the supposed gravitational waves. They can't pinpoint where they came from? They gotten to 4 detectors, but that got morphed into there's so much of them they got to be from gravitational wave background. 😂

Finally my guy is back

I wish I had all your recordings on cd or DVD. It Help take me away from lifes horror.

Why is LISA getting away with only 3 satellites? In my book, 3 dimensional forces need a Pyramidal structure to be distributed/measured directionally to a solid anchor (mass/fundament). Also. While LIGO has the earth's mass/resistance as a "measuring gauge", will those satellites even have the mass to react to a G-wave? Mass is the "resonating body" in space. Right? STOP CHIRPING Universe, Your Noise is destroying the "Big Bang"-theory.

Excellent video. I appreciated the math. Sent this to my grandsons. Thank you for the video. I am subscribed!

Thanks for doing a music free version, science lectures don’t need background music!

Greetings from Sweden 🎉 Lovelies indeed that you are going strong with this channel ❤

🖖

Thank you for sharing this amazing information David.... we appreciate your work a lot 🎉🎉

10:57 🤯 Never considered dark matter's relation to black holes until just now

Thank you! I always knew what microdosing was. Now I know what microlensing actually is.

Amazing video!

the collapsing waveform looks exactly like a bass drum hit, only in reverse

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18:55 What are the indications that the galaxies are interacting other than the filament? Why isnt it possible that the filament is just a structure of the foreground galaxy and wasn't caused by any interaction?

If a Proton were to look at us, it would see us stopped in time. A Proton travels so fast that we would appear to be frozen. It could observe us, but couldn't grasp anything about our universe other than there appears to be movement. The same way we look at these galaxies and see effects of motion but they appear frozen . We are the protons of some grander Universe.

With reference to the muon example for length contraction, if the earth is in motion wrt the muon, the earth may appear contracted, but why should the space between the muon and earth contract?

Why cheat about the title. The video is also interesting without cheating. The title announces the speed of gravitaltional waves but the whole video says nothing abiut the speed. So why cheat?

Enjoyed this very much.

So what are some proposed causes of the lack of gravitational interaction? They would both seem to be deficient of dark matter

You are a great educator 👨‍🏫

David you dont have to redo stuff in better/higer qualliity..your old stuff is still gold...i rather get more stuff from you then you redo stuff...youre awesome and i have learned a lot...all the best from Denmark

You are wonderful, thsnks!

Thank You Mr.Butler!

Brilliant. Thank you. I get it.

We have a legislative physics represented by a numerical language. In that omits a wave medium.