In conversation with Dr Alexandra Amon (Dark Energy Survey & Stanford University)
Vložit
- čas přidán 14. 06. 2024
- A week ago the Dark Energy Survey released its long-awaited 3 years worth of data - the positions of 226 million galaxies! Along with that came a whole load of new science in 30 papers (!) - I dived into them and picked out all the highlights, plus I spoke to Dr. Alexandra Amon on the DES team about her results showing dark matter might be distributed more smoothly than we thought.
You can follow Dr. Alexandra Amon on Twitter: / astroalexamon
Or on Instagram: / astroalexamon
My video on the history of dark matter and all the evidence we have for it: • All the evidence we ha...
You can access the Dark Energy Survey data for free here: des.ncsa.illinois.edu/release...
And read all the 30 papers (again, for free!) describing it here: www.darkenergysurvey.org/des-...
Amon et al. (2021; dark matter is smoother with S8 = 0.772) - www.darkenergysurvey.org/wp-c...
[Note these papers are all free to access!]
---
👕 Check out my merch here: teespring.com/stores/dr-becky
---
📚 "Space: 10 Things You Should Know" - UK Edition: bit.ly/SpaceDrBecky
📚 US & Canada version: "Space at the speed of light" (same book, different title, with some beautiful illustrations): www.penguinrandomhouse.com/bo...
📚 German translation "Das kleine Buch vom großen Knall" : www.dtv.de/buch/becky-smethur...
---
🎧 Royal Astronomical Society Podcast that I co-host: podfollow.com/supermassive
---
🔔 Don't forget to subscribe and click the little bell icon to be notified when I post a new video!
---
👩🏽💻 I'm Dr Becky Smethurst, an astrophysicist at University of Oxford (Christ Church). I love making videos about science with an unnatural level of enthusiasm. I like to focus on how we know things, not just what we know. And especially, the things we still don't know. If you've ever wondered about something in space and couldn't find an answer online - you can ask me! My day job is to do research into how supermassive black holes can affect the galaxies that they live in. In particular, I look at whether the energy output from the disk of material orbiting around a growing supermassive black hole can stop a galaxy from forming stars.
drbecky.uk.com
rebeccasmethurst.co.uk - Věda a technologie
Here before the title is changed!!
Same :DD
Samesies 😊
Haha, I thought that
THE ALEXCHAT
Only reason I’m in the comments at all today 😃
This is fast becoming my favourite "space stuff" channel!
could you tell me some other great space stuff channels please?
@waseabi52 PBS Space Time is one I can think of.
Try this video "1+ hour fake station fails"
Best ISS footage ever
Ok...This was an AMAZING interview! Lectures are great but a candid chat with a brilliant colleague and witnessing that easy exchange of information and insight is really wonderful to see. Coffee and a chat about the some of the deepest questions we can ask...omg pinch me. Thank you for sharing it :)
Glad you enjoyed it!
@@DrBecky - So impressed by people who truly want to see thing as they are, and not as they want them to be. The level of self-awareness and desire to avoid biases is quite inspiring.
Yeah, that's what's great about channels like these; just experts bringing us other experts.
Love the title "alexchat HD 1080p", it reminds me of old CZcams, an era long gone
Haha whoops - that’s what I get for scheduling on a Friday afternoon before going to the pub
@@DrBecky Going to or coming from the pub?
Tysmmmmm for all the effort you put in for us to learn something. You really are something dr.Becky!
"alexchat HD 1080p" my favorite title lol
The opposite of clickbait!
Haha whoops - that’s what I get for scheduling on a Friday afternoon before going to the pub
Thank God Christmas came Early.
If the Universe were the Lord’s Eye, Dr. Becky will be correct again.
@@DrBecky At least you have your priorities straight :-)
@@DrBecky haha it happens, if it’s a video from you talking about space I’d click on it no matter what the title was 😄
Wow, the insight into the degree they went to prevent bias with deliberate blinding is both eye-opening and truly impressive. THANK YOU !!!
blinding is eye-opening! haha
Great interview! Dr. Amon is a natural when it comes to science communication.
That litterally has to be the fastest 20 min. on CZcams. It is always pleasurable to listen to two individuals who not only enjoy their work but are excited and animated about it.
Fascinating, and always great to see people who are enthusiastic about their work!
The juxtaposition between the brains on display and how young you both look makes me realize how old I am. Then, the massive amount of data they're dealing with makes me realize how tired I am. Your excitement over this "nerdy" stuff makes me feel much more confident about the survival of our species.
Yeah, but what do you suppose they chat about when the camera is off? That cute technician in the office down the hall? That harridan in administration who climbed the CERN ladder heels-up? Recipes for mac-and-cheese?
@@davidvogel1756 Do not disparage mac and cheese recipes. Good m&c is fire.
@@Debilitator47 I am making mac and cheese for supper tonight. An old fashioned baked one, with cheddar that I grate myself.
@@johnhobson9165 Very nice. I do beschemel style, and also a butter/starch water emulsion style with very sharp cheddar that is so very good. Different enough in result that sometimes I prefer one, and sometimes the other.
Thee two young women .. are so dang attractive .. I want to shout .. BEAUTY and BRAINS!!!
⭐️⭐️Dr. Becky! You cover all the best, most intriguing aspects of the universe. You are an absolute star!! ⭐️ ⭐️
She covers Disneyland science like the Big Bang and the faked moon landings. Someone who's never even sat an exam in their lives could tell you the landings are a hoax. There's no wind on the moon so why was the flag waving?
And I'm still wondering how these 'scientists' have the nerve to call themselves scientists. Do some proper science instead of Mickey Mouse science. Universities teach Jesuit lies so their PhDs are meaningless. You've got a PhD in Mickey Mouse science.
@@misssarahashplant7493 You forgot the moon is flat...
@@lavluvlov Don't put words into my mouth.
@@lavluvlov All you have to do is show me a photo of the curved earth. No insults, not changing the subject and talking about the moon, just show me a photo of the point at which the earth curves like a ball. If you call yourselves scientists then show me proof.
🌎
By coincidence, I watched "The Edge of All We Know" on Netflix last night. The same type of big science with huge international teams and vast amounts of data, working for a decade or more. The most interesting thing, and what really made it was that they ran two parallel stories. The Event Horizon Telescope and Shep Doeleman's big teams in one, and Stephen Hawking and his small team in the other. The juxtaposition of theoretical and observation physics. An extraordinary film. Listening to you and Alex discussing the interaction between the various specialisations was fascinating.
I cannot believe how fast that 20+ minutes went by watching this video! When it ended I was astonished. Must’ve been interesting, right? :-)
Apropos of nothing, but the 300k subscribers mark is looming, and there's a ukulele hanging on the wall, so I'm calling ukulele recital for the 300k special!
Or piano And Singing a must. 😃
Your guys enthusiasm for this topic is infectious. Great interview!
That was a great interview on a fantastic subject matter, thank you so much!
This channel is by far my favourite astro channel.
I just wanted to comment that I could hear a Scottish accent coming through Dr. Amon's voice and a quick google reveals she studied in Edinburgh. What a beautiful world :)
Just found this channel! Love the work! I have a lot of videos to watch & a lot to learn 😀. Thanks for sharing!!! ❤️🙌🌌. I could not find the ‘Love’ button, but Liked and Subscribed!!! 👍
I really love this channel. Thanks Dr. Becky.
The human race is very lucky that some people love math. It is the brainpower of the few that lead us into the future. Thanks, Dr Becky, for being one of those people. Dr Amon is doing some fantastic work. Lead on.
226 million galaxies. Still can't wrap my head around that number.
amazing interview, just watched the webinar. when r we getting the 6 years data?
This is going to be great!!! I'm so glad we got this interview. Thanks Dr Becky for this. :D
The excitement is contagious.
"I work with very nearby things" Only an astronomer would characterize objects millions of parsecs away as "nearby" 🤭
It's just down the road!
Compared to the stuff out in the farthest reaches of space, that's very much nearby. Remember, it's all relative. ;)
You ladies look so happy...
Alexandra Amon 🤩 omg she's gorgeous in many ways.
Listening to your interview now. It's a good one. I believe that both dark matter and energy are related as an after-product from the creational primary big bang. I also feel that biological life has intersected this factor, as demonstrated in the original uncensored book, { Left turn at East gate, the Bentwaters affair }. But I'm not saying anything to argumentation at this point. Dr. Becky, please keep me in your virtual Rolodex, if your'e ever confronted with both DM and DE factors you want a second opinion on. I can shut my mouth and work well with others. Daniel J. Blatecky Wash State USA Regards & thank you, very much enjoy what your'e doing.
Tysm for a great interview!
5:30
What a lovely thought.
Peace!
\o/
Heart fills with pride to hear a brilliant Trini doing important research.
🇹🇹🇹🇹🇹🇹
This is a very odd request, but I am currently doing my EPQ at college and I am struggling to find a specific topic area to focus on/write about. I want to do something to do with space and I was using your videos for inspiration but I still can't find a narrow enough area to write about as I am sure you know that "space" is very broad and theres a lot of things I could write about. I was wondering if you, being an expert in this kind of field, could maybe give me a few suggestions on topic areas I could write about. It is perfectly fine if you don't have the time but I just thought getting ideas/advice from a professional who knows all about the wonders of the universe and the mysteries surrounding it would help me a lot. Thank you for your time(:
The measurement suggesting that dark matter distribution is smoother than previously thought/measured may also be the result of some sort of systemic error or bias in the method. And, if this is true, then those same systemic errors likely affect measurement of dark energy distribution. There are a lot of possible explanations here.
Though, the blinding method seems like a really good way to trying to root out method-based biases. That leaves measurement based biases.
you are such a Michelle Thaller. you keep me hooked on your channel
I have a question for you. It's unrelated to this video but I've been watching a lot of your videos recently and figured you would be the best to explain this to me. I've always wondered what keeps the gravity of the Earth from pulling the moon into it all the way. Or the Sun pulling all of the planets into it
It's the orbital motion. If they were stationary with respect to each other, they'd just crash together under gravity. Because the smaller body is moving, it pulls away enough not to crash down into the larger one. This is how artificial satellites can exist. You can imagine throwing a ball further and further until the arc of movement follows the curvature of Earth and doesn't fall down to the ground - it achieves orbit (this would be physically impossible given a human's limited strength, of course, but you can imagine it).
Amazing!
Can you please make a video about the theories and advancements in technology if the speed of light was dependent on frequency of the photon
Really good talk!
I would like to say thank you for sharing this chat with us Dr. Beckyand finally taking this subject is being serious.
The moon is pink
Please dr can you make a whole video about black holes and there types
I searched for you "dr becky black holes". czcams.com/video/CeKLKyzsJ2g/video.html
czcams.com/video/CeKLKyzsJ2g/video.html I think this is what you're looking for.
Lovely to see women playing important part in science
Dark like Bauhaus, Joy Division, etc.? Don't you just love that smiley accent with Dr. Alexandra, both of you are beautiful! Even prettier than Laniakea!
100 million !!!???!!!.......THAT'S INSANE!!!!
just 4 curiosity, but to assess the distance of a faraway galaxy it takes a SuperNova exploding there, since the REDshift trick is not accurate anymore, right? ...so, I wonder how such a huge, 3yrLong data collection is actually managed, given that over 99% of those galaxies probably did NOT show any SuperNova flashing at all
We only need the supernova to calibrate redshift measurements - once we have that, measure the redshift and use the calibration to get distance
'sorry: maybe (min17:20) it's just a matter of redshift calibration, isn't?
Can you please make coding video’s for astrophysics.
- By the way great vid
Best title ever!
Haha whoops - that’s what I get for scheduling on a Friday afternoon before going to the pub
Hi Dr Becky. Thanks great job! Great stuff 👍
First 😀 I look forward to this interview.
You two beautiful women are amazing.
becky should keep the title.
Haha whoops - that’s what I get for scheduling on a Friday afternoon before going to the pub
Woohoo here it comes, 🎉🎉
I watched this while drunk and didn't comprehend a word but I still liked hearing two expert young women having a professional conversation. It was a Bechdel moment.
that's probably look pretty nice on one's CV! :-)
This is the kind of title what many old videos used. feels vintage
Haha whoops - that’s what I get for scheduling on a Friday afternoon before going to the pub
Measurements is one thing but interpretation of these datasets is what’s in question.
Has anyone ever measured the curved earth or built any kind of building on a part of the curved earth? No. Why? Because we live on a flat, stationary plane. I've read classified CIA documents and they admit it. They teach their hocus pocus globe model to the masses to control them.
On the one hand, we are making some really cool discoveries. But on the other, all the easy science has been done. All that is left is the stuff that requires the most advanced technology and the cleverest scientists.
Wow, somebody acknowledged this... Used to wonder about this everyday
You can't make any worthwhile discoveries because everything has to be peer reviewed. Idiots who think they're spinning around on a Jesuit ball at a 1000mph have to give their approval to other idiots who are also hurtling through space at breakneck speed.
Get away from the stale air of the universities, out into the fresh air of real life and do some true science. Disneyland films are for children not for adults.
@@misssarahashplant7493 True that. I do find the University culture toxic sometimes, you never know what one may discover if he/she were to leave this fear of rejection that plagues their minds all the time they are engaged in research.
@@rohN1616 Universities are at least part-owned by the State which means they have to teach the State's version of reality. Hocus pocus in other words. And Imperium Romanum is alive and well and they're covertly pulling the strings. The Roman Empire didn't fall, it simply changed its name to the Vatican. If you want to control a 'global' population then you have to control the flow of information.
@@rohN1616 It's very important for these people to control the universities, because by doing so they ensure that indoctrinated graduates become foot soldiers for the system who go out into the world and indoctrinate the next generation.
The covert rulers can't control humanity physically because there's so few of them but they don't have to. The best way to control them is mentally. If you can control their minds then you've got them round your little finger and they do your work for you. Getting them to indoctrinate each other is the name of the game.
Dear Dr.Becky, Please don't change, even a little bit. And don't pay any attention to anyone who would ask you to......................................rj
Sorry to say this but i think you had missed to put the link in the description
Haha whoops - that’s what I get for scheduling on a Friday afternoon before going to the pub
17:32 "(paraphrased) We don't look 10 years ahead; 2 is enough. I hope to see the fields merge." That's way too soon. In 2 years, we'll be lucky to organize the notes.
Amazing
What would it take to shift the stats info 3.0 Sigma ?
Omg never been so early!
Same here
Hey I'm hoping someone can tear apart this idea I've been kicking around about dark matter. Basically that it's a scale problem.
Here's what I mean imagine that the gravity of objects it represented as martini glasses, just chose them for their conical shape that resembles a simplified gravity well. So heavy objects in big glasses, light objects in little glasses. This works really well for everything from asteroids to black holes. You can scale up and down you can predict the mass of objects you can't see, can't say enough good about it....
But you can't scale it up to the size of a galaxy because the depth of the gravity well doesn't increase. The reason I used glasses rather than the more typical sheet analogy is because it helps to visualize that each object in a galaxy already has its own little gravity well. These glasses aren't affected by the proximity or absence of other glasses, their gravity can't distort space time any more in a group than alone.
So in a galaxy rather than having this martini glass shaped gravity well you have the very deep glass of the supermassive black hole with a very wide thin film in a disk spread across space-time.
Interested if anyone has ideas.
By film I meant millions of small glasses distorting gravity in a wide but shallow gravity well, and thus create the artificially wide gravity well that gives the false indication the galaxy is significantly more massive if the original martini glass shape was maintained. Just a clarification.
So, 400 people shared between them 226000000 galaxies; that it resoves to 565000 for everyone.
A little greedy, aren't they? I want a galaxy, too!
Early this time
Just imagine the information we will have from jwst. I've thought this about a dozen times when watching these deep space studies
Do you study WATS and NATS in your research?
I want a T-shirt that shows a pie chart of the energy distribution of the universe, with the caption "I am the 5%"
Cog in a mechanism is a good analogy, but a better one would be a cell in an organism, and shes lucky to be one of the brain cells.
0:20 space war tank?
Can anyone point me to a math-oriented video showing how more mass results in the flat galaxy rotation curves of Vera Rubin et al?
Did they took account frame dragging in their calculations?
paul sutters opinion on this project was completely different so im surprised at this disparity of excitement between people that are roughly on the same field (astrophysics). one says that its a christmas present, the other says that is more of the same thing... what's the truth 😅
Maybe a silly question, but if you have local measurements and global measurements of equal quality, why wouldn't you trust the global measurements more? Intuitively I'ld say it's better to measure the whole than to measure only a part and extrapolate. The CMB takes everything into consideration while the local measurements are only taking local information while the local standard of rest is unlikely to be the same as standard of rest of the whole potentially introducing distortions.
But the CMB is light from the early universe which we then fit a model to and extrapolate to now. It’s not technically a direct measurement like the local ones
@@DrBecky Good point, faith in the model and directness of measurement play a role too. Thanks!
Do we have any idea about when our galaxy started its formation and why there are several stars inside it whose age is very close to the estimated age of the universe.? And how we are sure that all faint and reddish galaxies we can observe through Hubble telescope were formed soon after the Big Bang? Any other way to estimate their formation age other than their high redshift? In other words: were all galaxies formed at about same time I.e. around 13.8 billion years ago?
A bang is an explosion and explosions by their very nature cannot create anything. Asking Disneyland scientists for information is a case of the blind leading the blind. You're both as clueless as each other.
As the Hopi Indians say, we are the ones who we've been waiting for. Teach yourself instead of relying on stodgy professors.
@@misssarahashplant7493 Explosions certainly create things. And besides, the Big Bang was not an explosion. Dr Becky doesn't seem much like a 'stodgy professor' to me.
@@Jehannum2000 So a bang isn't an explosion? You must have your own definition of what a bang is. The Big Bang is a woefully inadequate explanation because life is not a random cosmic accident.
Dr. Smethurst isn't stodgy to be fair to her but the Big Bang just doesn't cut the mustard.
@@Jehannum2000 What professors don't teach you, whether they're stodgy or not, is that the Big Bang is part of the Jesuit agenda: They want you to think you're a random cosmic accident apeman whose spinning around at a 1000mph.
@@Jehannum2000 Modern science goes against Occam's Razor.
I totally missed that there was a visible solar eclipse today. 😞
👍
Cosmic.
She has a charming Irish accent for a Trinidadian-British astrophysicist working in Scotland. :D
When did they move Stanford University to Scotland?
@@johnhobson9165 Ah, read too quickly. Her bio said she was at the Royal Observatory Edinburgh, but I guess that was just for her PhD.
3:09 bobble head becky xD
Why "dark energy survey" when they measure dark matter?
I am confused
It allows us to probe both. Dr Amon’s work focuses on the dark matter side of things. See my video from Thursday for the dark energy side too!
Is there some "dark Energy" wave ?
A hundred million galaxies a dozen or so billion light-years distant? I don't see the challenge here.
Yea...I got nothin' 😕
As we zero in on better representations of reality I can't help but wonder what monstrous concepts are lurking, yet unseen.
Honest question for you so is there a reason that we seem to obsess with the search for dark matter which we have yet to find or now dark energy which appears to be just as either non-existent or “hard to find”. Question why is there such animosity in cosmology and physics to call this world for what it is an electromagnetic driven system. You can replace your search for dark energy with magnetism and nothing changes so why avoid the force we can verify for the search of the equivalent of Jesus out there in the abyss? There is so much that can be explained by experiments going on with both electromagnetism and plasma in labs that can be scaled up to the cosmos. Also do you intend to ever cover the magnetic excursion that is in the middle of happening to our planet and those potential impacts to living creatures here in the next 100-200 years? Look back at genomic records. This is when species disappear or make huge jumps in evolution. Electromagnetism governs everything here not some unseen Jesus you refer to as dark matter/energy. Just wondering why science became nonscience? The scientific community has become as bad as religion you have your dogma that everyone follows as if it is the Bible and most scientists won’t question anything in this world that their grant doesn’t permit them too which doesn’t sound very scientific at all to me. I ask all of this honestly because I respect you and I would like to hear you take on the magnetic excursion, and your take on magnetism being the real dark energy your looking for. Thanks in advance. Sorry for the rant.
It's down to the small matter of it being incorrect.
When we attempt to understand how the Universe works, perhaps we need to consider how crazy it is that it exists at all. How can something be created out of nothing? It certainly appears that we have a Universe containing vast amounts of both matter and energy. But it also behaves in ways that we don't fully understand. Hence the need to introduce the mysterious dark matter and dark energy. Perhaps if we are ever able to explain it all, we'd end up with a model that contains both positive and negative matter and energy which exactly balance out, leaving us with zero - the only answer that makes some sort of sense. Of course, it could also be that there are two (or more) Universes and it is only when we discover and combine the contents of them all, that the answer will become zero. Unfortunately, none of this explains how the nothing got to be separated out in the first place. Or is the Big Bang alone enough of an explanation? I suspect not.
You are making the assumption that nothingness preceded the universe (and that nothingness is possible at all). There is no reason to suppose this is true.
That's so much data 😭
Title needs to be changed ??
Haha whoops - that’s what I get for scheduling on a Friday afternoon before going to the pub
Omg..... hahaha.... just saw that you replied
226 MILLION CATALOGUED GALAXIES!!! 🤔 How do you manage all that data?
They began analyzing data from 2017
@@alishba2007 can you imagine the variables? They have the greatest job in the world.
@@alishba2007 if you're into gravitational waves, check out the L.I.G.O. in Livingston, Louisiana. Most notably it detected the collision of two neutron stars. Could you imagine?💥
13:04 dEEP data
Both of these women are so hot!
Hello becky, interesting video. Tho I would like you to comment on the the scientific view/stigma of the American governments exertion that ufos/uaps are real. What implications does this have and why is it so hard for the scientific community to accept somethings that is unknown.
Well. Don't trust the government too much! Trust but be skeptical
@@stereoheart.806 That is a healthy approach to anything. But this has been a long standing situation that hasn't even been studied by the scientific community just dismissed without investigation.
@@stereoheart.806 Where in science has a study been done using 3rd party data to make a hypothesis or conclusion. If science doesn't look at this themselves without bias, it's not going every been conclusive.
@@allrightsreserved233 yes. And that videos that the government put out? There are honestly super weak. Like 2 of those footages were caught in uv light. And those the ufo didn't move in that video. The camera got locked and locked out two times. I honestly can't find the big deal on the new footage. I was like that's it?
Take my words with a grain of salt
You're using a fiducial case; not an exact or trustworthy start, or good term of reference?
Modern scientists have the wrong model and the wrong method. The Ptolemaic model is the correct model but they're using the Copernican which is Jesuit hocum. Copernicus dedicated his book to one of the Farnese popes whose name eludes me at the moment. Dedicating something to that evil family tells you a lot about Copernicus.
Here in my opinion could be a problem. What safe guards to they have to prevent BIASED expectations from drawing the CONCLUSIONS?????
If you watched the video, they covered the multiple levels of blinding used.
@@mduckernz I watched but was unconvinced that they are deriving results that they believe to be true. It just appeared that they have preconceived "ideas" already of what to expect from the analysis of the new star/galaxy data.
Title changed?
Haha whoops - that’s what I get for scheduling on a Friday afternoon before going to the pub
@@DrBecky you just made my day doctor!
Where did they take into account for the energy absorbed by elemental gasses? There are huge clouds that never coalesced into molecules. Away it goes and one charge needs another, right?
Funny this is also evidence of quantized inertia