What Is Gravitational Lensing?
Вставка
- Опубліковано 29 чер 2024
- Learn more about gravitational lensing with host Caitlin Hofmeister.
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Sources:
www.ipac.caltech.edu/wfirst/ov...
imagine.gsfc.nasa.gov/docs/fea...
www.cfhtlens.org/public/what-g...
www.einstein-online.info/spotl...
astro.berkeley.edu/~jcohn/lens...
www.noao.edu/image_gallery/htm...
I like her, she speaks well and with energy
Could have better voice acting though. It's pretty obvious that she's reading off of prompts. I know they all do, but the others make it less obvious.
***** Right
***** I actually think this video is a big improvement for her, much more naturally enthusiastic than her previous ones. I think it's just a matter of practice and getting used to speaking to a camera. I'm glad because I always wanted to like her as a host, but found it jarring that I could clearly see her reading. I look forward to seeing her become as comfortable and natural in front of the lense (wink wink) as her co-hosts
***** Stop hating on her, shes probably better than you.
Drew Lare I didn't hate on her, nor did I say I could do it better, in fact I know I'm a horrible voice actor. My point is that she's doing this professionally, so she should be a bit better, and she is getting better as she does more videos.
i don't know what it is about her, but caitlins voice or affectation or something, makes me retain all of this information really well. wtf talk about stage presence
Can we all just stop talking about how Caitlin looks? Talk about what she's talking about instead of something almost completely irrelevant. Literally every video she presents, the comments are flooded with people talking about how she looks, and this one is no exception. People look different to you. This may be a shocking revelation to some of you, but it's true.
That's why we need feminism. Every time a woman does something men originally does (like science videos on UA-cam, politics etc) no one focuses on what she's doing or saying, but what she's wearing, her look and wether or not she is worth having sex with. Women are continuously objectified and seen as a tool for men. Therefor we need feminism in this world.
(just look at the "dislike" count on different SciShow Space videos, depending on who's talking)
hte concept of motivation has been misplaced into not sexual. please do take things out of order.
Pianca Islam We don't need feminism. That just causes more problems than it solves. People just need to stop being cunts.
MiniClown2 I'm being a human being, considering how repeated discussions of Catlin's appearance makes her feel. She presents a show on UA-cam and she's damn good at it, and we should leave it at that.
I like that: "A dimple in Space-Time."
That sounds really adorable, like you're a part of mother nature's smile or something :3
Whoaaaa... the Einstein Cross just blew my mind. Great video. Well done, Caitlin!
Could you guys talk about the "great attractor" and our local cluster of galaxies moving towards an "unknown supermassive object"?
I've even heard that there is a group of galaxies being pulled towards a point that may be "outside" of our universe (possibly the influence of another universe O_O).
I find these things totally mind blowing.
Sure! Please keep suggestions coming! Thank you!
SciShow Space
YAY!
that just sounds like wild speculation, there are still to many things we don't understand, dark matter/energy, unable to join general relativity and quantum mechanics etc, our theories aren't perfect.
btw, just wanted to add that i think the host is doing a good job, she is energetic and it seems like she cares for what she is talking about, keeps it interesting.
Pivitrix mostly everything are wild speculation, i dont really believe its a another universe or its something outside our own universe, i find those theories ridiculous, but the galaxy clusters are being attracted to something outside of the observable universe. i find the great attractor and the dark flow theories fascinating.
How to make a model on it
Just wanted to say that I really love Caitlin's presentations. She seems to enthusiastic about the topics, and really animated in her speech. It keeps me interested in the subject, even when the concept seems a bit over my head. Keep it up Hoff!
Why is it that she gets so much criticism. You don't like her? Unsubscribe. Or maybe contact Hank and ask for her job. You do a wonderful job, Caitlin.
Shutup
Thanks for another great episode, Caitlin!
Thanks for doing this episode. I only had a basic understanding of gravitational lensing since it's mentioned so often, but now I feel like I have a better grasp on what causes it. It's also interesting to learn that a lot of things are "out of focus." It makes sense, but I had never thought of that. Keep up the good work, Caitlin.
Great simple explanation. The example of the glasses makes it really easy to understand. Thanks.
Great video with great explanations. Thanks for the upload.
Always so excited! :)
Holy motherf**ker awesome episode. Thanks, Caitlin! Loved your performance.
please,an episode on "black holes and quasars" in brief,will be great.and,
LOVE YOUR SHOW AND ALL OF THE MEMBERS AND THEIR EXPLANATIONS.thanks!
You are a great presenter.
Not much else to say (episode was awesome, is something else I could say).
Good video, and well explained. You seemed really enthusiastic about this topic especially, and that made it particularly engaging :)
Thank you Caitlin! Very informative
more please! this was awesome!
I'm really happy you explained this. I didn't even realize I didn't know what you were referring to in other episodes.
Loved this video !
I love her enthusiasm!
Great video! :D The concept is really interesting.
Nice video! I have always been wondering about gravitational lensing :)
Great explanation! Thank you.
One of the most awesome moves SciShow have done recently is make a separate channel dedicated to space because I love all things related to space and find these videos very interesting. The next awesome move was have Caitlin host the videos, she presents them well with passion and enthusiasm. Keep up the good work good work guys.
Thanks for the captions:)
Yay! Caitlin's back!
Awesome video! Keep it up!
More often than not, I get misty at some point during these episodes. Space is just so beautiful and poetic. Thanks for this, SciShow Space.
this is so fascinating
Thank you for making awesome videos :)
Great Video! It all makes sense now.
see sounded a lot less "scripted" this episode, glad shes getting use to being on the show.
this really helped me. Thank you so much :D
Well explained, thank you.
Really cool stuff!!
An exceptional explanation, such energy! My only complaint is that the graphics, beautifully done, were only shown for maybe two seconds! I barely had time to appreciate and LEARN FROM THEM. Rather, too much time was given to showing the host. Such an easy fix; more and longer graphics.
Is this one single sentence without a full stop? Its a good science topic, not a speaking speed competition.
+Akshay Peter I agree. I was following most of it, but for a new subject, sometimes I need maybe 3 seconds to process/picture what I just heard. I was not able to do that here. I talk fast when I'm nervous. Perhaps that was the case here? Also, a couple more examples of concepts/analogies would be helpful.
+Danielle M Exactly the same thing i was going to say
+Danielle M You did perfectly fine. It just needs to be slow especially because its not an easy to grasp topic. The listener's brain wont be able to process so much info in such a short time especially if the topic is things we cant correlate in day to day lives, and also if the speed is more than a normal talking speed. I think when you explain something, you need to talk even slower than a normal person - to person conversation.. Anyway all the best :)
+Rusc Anfa Well, I'm not native to English either, and a speed slower than this would just be bothersome.Maybe practice a bit more to speed your perception?
totally agree. was rather annoyed at how quickly she was reading her script.
Your MOM is creating a dimple in space time right now. jk
I accidentally read this comment the same moment she said it ^^
the only this missing is 'yo momma'
Well she is...
Actually, you're not wrong.
amazing stuff
Cool, cheers for sharing
I like this girl - good job miss!
excellent video
Caitlin, thou art truly awesome. Great explanation.
Woooo! I'm doing research on gravitational lensing and discovered candidate lenses, including an Einstein ring.
Today, 2022, the first picture from the James Webb telescope was published. We can truly see how Gravitational Lensing looks like.
Didn't realize that gravitational lensing came in so many flavors. Great episode.
I love Caitlin!!!
thats amazing thank you
You are an awesomeee host
Very interesting!
I love it when you are the host! You are such a great role model for young girls...you must be a great dinner party guest...
Caitlin! Welcome back.
Great show! Really clear explanation. Thank you.
(the animation really helped understand the ideas) Thank you Thought Cafe??
Love this video, it's somthing really complicated expand really well! And I think it is so cool how a massive star probley billons of times bigger then your pair of glasses can act as a lance! And how discovering plants by them getting strongerm! That's just genius!!! Love you physics
Thank you
am i the only one who likes hank more than her? she's not terrible, but i don't see what you guys are all raving about.
It's a preemptive strike against her haters. Since she first started appearing on camera there has been a never-ending succession of smeg-for-brains jerkwads saying "Your ugly" "You should wear more makeup" "Your teeth..." and when they get shot down for their sexist attitudes they change it to "You talk too fast."
So a lot of us like to send a bit of encouragement her way because she is a good presenter and the never-ending line of asshats spreading their negativity needs to be countered.
I have this strange urge to go find my Op Ivy cd. Hmm.
yes i know i dont like seeing women nerds its weird...
jonah holmes she kinda reminds me of my elementary teacher.
isaac608 Garrus_Mason that's your opinion and it's ok but the topic here is not if you like her or not it about what she said. In my opinion this kind of comments annoying me cause are irrelevant and stupid. Please use your mind and let's talk about science
Yay! Caitlin is back!
Came here after reading a big bang theory article where singularity was mentioned in which gravitational lensing gif was playing which was really fascinating.
Is it just me or is she the prettiest science teacher ever?
Growing up in Liverpool, England I had grumpy, bitter, stuffy old men as teachers.
I know she may not strictly be a teacher but she is beautiful!
Presenting style is perfect now. Excellent video.
I
why do her videos always end up with comments with personal attacks? comments on hank or the other guy videos are more on the topic.. i know nothing about space-ology and yet i can still follow what she is saying..
So to Caitlin or any scishow space staff reading the comments, keep up the good work & don't let internet trolls get under your skin
I always wondered how i was that these gravity lens were conveniently focusing on us observing from the earth. I now see that they are not usually in focus, and that we infer the source through the distortions. Neat!
Ok that's cool and all but can you tell me how Prof. X came back to life for the new X-MEN movie.
SPOILER ALERT FOR X3:
So in the after credits of X3, there's a comatose man that Moira's working on, who suddenly says her name, to which she responds "Charles?". Professor X transferred his consciousness (this was discussed earlier in the film) to his twin brother (I've been told this was in the comics, but humans lie, so yeah). My theory is that, as a top-level mind mutant, Xavier constructed a new body telekinetically out of new atoms and transferred his consciousness back from coma guy. Hope that at least helped!! DFTBA!
Garrus_Mason that's your opinion and it's ok but the topic here is not if you like her or not it about what she said. In my opinion this kind of comments annoying me cause are irrelevant and stupid. Please use your mind and let's talk about science
OMG, this is a joke comment. Okay that's it I'm just gonna post this on the sub reddit r/woosh. Dear God please guide these kinds of people on making them see and giving them the right knowledge that not all comments are real, but just for jokes, fun, and or laughs.
I like her but just a suggestion: talk slower. It feels like she's rushing through it.
couldn't agree more. I dont know if maybe it's because I'm kind of tired but I had a really hard time following her, I think because it took me so much time trying to make out what she said so she was already onto something else before I fully put together what was said.. It took me a couple views to fully take in what was said,
Well if they would their vid's would be around 10 minutes which is (for me) too long to "just watch them", and because they are full of random facts, like when they first saw this and that, i don't care they talk faster, which is also the case with the regular scishow, lots of facts
I like hosts that talk fast. Hank got me used to it.
Most of the videos put together by Hank and John are packed full of information, and in order to keep their videos to a relatively accessible time length they need to talk fast.
Im more stoned than a gay Saudi Arabian, but i still understood everything she said.
I read from a sci-fi book (_Existence_, from David Brin) that you could use our sun's gravity to create a ridiculously powerful telescope. You would need the telescope to be orbiting around the orbit of Neptune or so, and you would stare back into the sun and use its gravity lens to examine objects on the other end.
Perhaps you could do an episode on these hypothetical (or perhaps even proposed) super-telescopes :D
For now we have the James Webb. What a time to be alive.
A planet moving across a star is your answer for everything on this show. :)
can you guys talk about the lagrange points and possible and future missions involving them
Hey guys, this is one of those rare events where I feel like I have something to say and I'm sorry its a criticism. I have noticed though that the sound levels are a little wonky on SciShow(Space) videos for a while. Not within the video but within all of youtube. I always have to raise or lower (usually raise recently) my volume when clicking over to a SciShow vid from another video on youtube. Just wanted to point out that possible consistency error. Otherwise great stuff!
i have a question. can you tell us about space lightning/ staticly charged dust clouds? maby even about how dangerious ""weather"" in space can be. "weather" refering to solor winds, strong gravity, dust, vapor particals and other massave objects in space
What Is Gravitational Lensing?
Mind blown
Out-of-focus lenses produce multiple images? Who gave you that idea?
It's a distortion that's causing the multiple images. That's a completely different type of optical aberration.
Well, lenses are kind of distorted. But you have to be nearly blind if you have glasses that have big and distorted enough lenses to produce distinguishable multiple images when out of focus.
Penny Lane Gravitational lenses don't work exactly like regular optical lenses. In gravitational lenses, light is refracted more if it passes closer to the center of the lense. In regular lenses, light is refracted less if it passes closer to the center of the lense.
Therefore, gravitational lenses don't have a focal point like regular lenses have. Instead, they have a focal line which is the line from the observer through the lense. Everything on this line will appear as an Einstein ring, regardless of the distance. Only the radius of the ring changes accordingly to the distances.
Double images of the same object would be caused by an irregular geometry of the lensing object.
dLichti Very interesting, thanks! :) Although it should maybe be noted that when you say "normal lenses" you mean these carefully crafted things that are _made_ by people to produce an image. Galaxies and dark matter halos probably don't care all that much about their imaging qualities in the first place. So even if they were somehow to behave like huge chunks of glass, they would still distort as hell.
All this doesn't change the fact BTW that out-of-focus lenses don't produce double images which actually was my initial point. I wish your explanation of how exactly the distortions come about was in the video. Instead we get the obligatory sloppy research moment that practically every SciShow episode has at least one of.
Imagine if this effect just didnt exist or we never discovered it, I wounder how lost humanity would be, and awesome job on the camera i never saw you before and was impressed.
Caitlin, were you a part of the attempt to keep the Keep Looking Up show online? I was 1 of the dozens who watched to find where the planets are in the sky
Ur content isgood
I knew all of this - I just watched this video to make sure you did...
Hi Guys,
More info on Celestial Poles please.
#scishowspace
Great show
Is the lensing affect brought on by gravitation causing a higher density of light to travel in the center or around the circumference of the lense? Also is it particularly ball shaped? or really more of a contact lense. I think if we've proved gravitational lensing then we should be able to virtually visualize the shape of a lense around an object? And are there researchers developing a way to measure space density in the fabric itself?
THE WAY SHE TALKS GETS ME SO EXCITED SKFKSKSKJS
Gold
Where can I get a poster (or t-shirt) of that star system on 2:54? It's just too beautiful!
Whoa!!
Whenever I go on one of her videos there are a ton of comments criticizing her... when I go on hank's channel they're are a ton of comments asking deep questions and saying how cool it is....
This is literally so interesting lol.
Why all the hate?
GAH YOU ARE SO CUTE
Also, the Einstein Cross really feels like an optical illusion of galactic proportions
But GAH SO CUTE PLS DO MORE EPISODES
The first observation of gravitational lensing was not QSO 0957 in 1979. In 1919, Sir Arthur Eddington observed the deflection of light due to the gravity of the sun - the first empirical observation which confirmed Einsteins theory of general relativity.
Gravitational lensing was the way they ascertained that there are more planets out there than can be detected by all the other techniques; I used the data in class two years ago. REF: [2012 NATURE] 12 January #481 p167-169: “One or more bound planets per Milky Way star from microlensing observations” Astronomy 281 (Freeland) Mr. Raymond Kenneth Petry (Senior Visitor) Homework #5 (Essay) Feb. 14, 2012 (Due)
Read all the comments about gravitational lensing on the Nasa james Web Deep spce horizon and came here to learn about it
So when matter bends space does the space bend towards or away from the matter?
Here because of the new JWST image.
What if the large object gravity is not bending the small photon but the small photon is magnetic in nature, in other words a small magnet, & when it passes an object the photon's magnetic field interacts with the object? If I shot a magnetic bullet past a piece of steel it would bend slightly towards the steel.
JCHangtime Good, but photons have no charge :')
Could you guys describe what EXACTLY the Oberth Effect is? I've been using it in KSP and read the wiki article. I get how to use it, but don't really understand 'why' it works.
So with gravitational lensing and time it takes for light to travel in mind, is the image of space we see different from the objects space thats actually there?
Why does light go wider around and away from the the massive object and not converging toward the object? As spectime has a "dimple" at hte location of the object?
I LOVE HER
Can you please make an episode about how we measure the distance from other stars?