Neil deGrasse Tyson Explains the James Webb Space Telescope
Вставка
- Опубліковано 20 гру 2021
- What is the James Webb Space Telescope? On this explainer, Neil deGrasse Tyson and comic co-host Chuck Nice explain the JWST and all the science behind it with the help of Chief NASA scientist Jim Green.
What is JWST looking for? Will it be a replacement for Hubble? We explore the different wavelengths of light and how JWST will let us peer into the past. Is JWST essentially a time machine? What sort of objects will it help us see? Can it track objects within our solar system? We break down where the telescope will be pointed first and where it will be launched to. How far away will the JWST be from Earth? What is L2 and where is it? Finally, we attempt (and fail) at getting over the excitement of launching something that has never existed before!
Get the NEW Cosmic Queries book (5/5 ⭐s on Amazon!): amzn.to/3dYIEQF
Support us on Patreon: / startalkradio
FOLLOW or SUBSCRIBE to StarTalk:
UA-cam: ua-cam.com/users/startalk...
Twitter: / startalkradio
Facebook: / startalk
Instagram: / startalk
About StarTalk:
Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up!
#StarTalk #NeildeGrasseTyson - Наука та технологія
We forgot to mention that we posted a full episode about the James Webb Space Telescope, oops! Click here to watch 👉 ua-cam.com/video/IxKzh6ilMas/v-deo.html
Amazing work, thank you!
Proxima Centauri B
Non, it's more that it's different and more powerful in that is like comparing one graphics card to another 3 generation later in that they say it's hundreds of times more powerful but it's really only 20% better simply works with the latest drivers.
Q: The base has a reflective surface would it cause some type of feedback on the lens? My thought is it would be the greatest black to avoid this.
please mute Chuck Nice!
It's exciting to know Webb might take the *_first image of Proxima b!_*
Might...😶
Let's have this conversation in six months...🥶
Good luck taking a picture/image in infrared...
@@louisrobitaille5810 Of course you can.
@@louisrobitaille5810 🤣🤦🏽
@@louisrobitaille5810 interesting comment
All digital cameras (I think) have sensors that can detect IR. But they have a filter in front of the sensor that blocks the IR. SO...
You can take the camera, remove that IR filter, ADD a visible light filter (say over the lens itself), and then take images in IR. It is quite easy to do.
The images that you get are B/W in nature but they are very much IR images.
ALSO! Try this. Take a standard remote control that you would use on your "TV" monitor. Click a button while looking at the sensor. Don't worry. It is IR!!!! It can't harm you. You see nothing. Now take your "smart" phone or any digital camera and look at the sensor through the camera. Click a button. SEE! A little white light now shows up!!! The camera takes the IR and senses it. BUT for you to see it, obviously, it must display it in visible light.
No. WE cannot see the IR light itself. But it can be made visible to us via some electronic manipulation.
Kinda the same thing as not "seeing" radio waves. But since those carry radio and TV signals to us, we use devices to convert the information on those carrier waves into what we CAN sense, sound and light!
The most important scientific achievement of mankind to date. Just the thought of going back in time should make any human being on earth just wonder in amazement. We all must hope and pray it's mission goes exactly as planned. Just imagine what we will begin to learn about the Universe and it's beginning from the telescope? I am 63 and can only hope I'm alive to experience some of James Webbs exploration results. Can't wait.
Well back in time is something our telescopes have already done and doing. James webb is going to be stationed in a better spot in Solar system to observe in infrared. Having only 10 years life time is disappointing but hope they expand its serviceability.
@@niladisify3811 I couldn't agree with you more. I looked this telescope up its life span is only 5.5 years with enough fuel for 10yrs in hopes it could last the full 10 yrs. But I agree still very disappointing for 10 billion dollars. They better find life on another planet. For 10 billion dollars
I strongly disagree. This will increase our knowledge but it has slim chance of being transformative, we have things such as invention of computers that has changed our entire lives and will keep changing lives and it is what has led to this point and it is what will lead to advanced AI.
you are 63 and have the name Big Dawg?
Yeah let’s go to church and pray , 😂
I’ve always been amazed by the way Neil Tyson Degrasse explains what is unknown to most. I feel as if I am a moth being drawn into his unrelenting knowledge. Thank you Mr. Tyson.
Me Too
Yes he really knows how to explain things to the general public
LOOL
Oh goodness me.
Wait till you read about how he treats women lol
I cannot even begin to describe how much joy Neil and Chuck provides me. I so wish I could have had them as dinner guests.🚀
PLEASE continue to invite Mr. Green back after his retirement from NASA! He's always a fantastic guest to provide insight into all things NASA!
Normally startalk is 60 min. This was to short.
I am a neanderthal when it comes to space exploration and astronomy yet I feel soo at ease when I listen to these amazingly intelligent people. It makes me want to improve myself and improve my understanding of where we live. This telescope could unfold so many secrets of our existence.
i simple caveman
i see neanderthal
i click like
see you in space, lest you get hit in the face with a mace
Good energy, great talk.
The guest didn’t answer any of the questions but two that he was asked he pivoted everytime he was asked a good question like what’s is JWST aimed at first.
@@albundy7198 pretty sure he said they were gonna check out our own solar system first, everything past Mars. Just took him about 5 min to explain it. Lol
I found out today a guy who went to the church I was made to go to as a kid and is friends with my parents has worked as a thermal systems engineer on the project for like the past decade. He’s going to be at the launch tomorrow. Really cool. I am beyond excited for this to launch and for it to start expanding our knowledge of the cosmos.
I saw the footage in the command centre. Everybody looked so tense. All their fingers would have been crossed if they weren't busy.
I hope they go over some of the iconic areas they did with Hubble and do a comparison. I'll bet difference will be breathtaking. 😍👍🏻
different tools for different things. Unnecessary. We need new info on to be confirmed phenomena or to see the most distant objects in time, which is made easier by the IR telescope.
I think the flagship model will have better pics.
Both very valid points. I have no doubt the new things this baby will see will be as incredible as the things the hubble first saw when it came out. That being said im still curious to see a comparison . 🤷🏼♂️
That's the whole idea of this new telescope. They looked at some areas with Hubble and found either too much dust or an area more empty that it should be. Dust can block most visible light, and many objects are only radiating light in the infrared wavelengths so Hubble would only see an empty space in many areas and too much dust in others.
yeesss very interesting thought, although I'm looking forward for every plan this telescope has to carry out, I bet that there are plenty of new things waiting for discovery!
4:30 what do you look at first?
After watching 100 videos on JWST across 20 different channels, leave it to Chuck to finally ask the one question I’ve been thinking the whole time.
And it went unanswered, did I miss it?
@@wagner55 Nope, you didn't. They are keeping that information secret for the time being.
Hope everything goes well tomorrow
This launch is really important for mankind.
I love you.
why?
@@coryleblanc
Well, to explain it as easily and quickly as possible:
The Hubble telescope is in Earths lower orbit. It's brought us almost everything we understand about our own cosmos.
It's the only reason our beloved Marvel hero movies have some accurate depiction of space.
It's the only reason we partially understand planet, star and galaxy formation.
JWST is 100x more powerful than Hubble and can also observe in the infrared wavelength of electromagnetic radiation.
This is huge.
Much love
Oh so you love space? Never every galaxy
@@michaelwillette5837 how tf does someone like me with no knowledge of space nd stuff understand. nd where exactly to start with
What incredible, humble, insanely intelligent men you are.... Sometimes I wish I didn't love this subject, it's just sooooo hard to wrap my head around some things, it drives me crazy...
I appreciate everything you do for us Dr. Tyson, My boyfriend is homeless and one of the main things that keeps his head up is watching your videos everyday. Keep up the incredible work brother!
I livestreamed the launch ua-cam.com/video/SSOquW8nyFw/v-deo.html please share ur views:)
I absolutely love this! Can anyone recommend a source for the more specific experiments / plans that they're looking to do in the first months / year?
Thank you, Neil. These are exciting times and I love the way you explain things. I appreciate your time.
I'm more excited for JWST launch than I am for Christmas to be honest.
Same! Can’t wait to see what it uncovers!
@@patrick6213 it is already on space! a very nice present for humanity on christmas =)
@@victoryoso4955 I thought it launches on Christmas Day?
@@patrick6213 it's gonna launch in a few hours
It's Christmas day and I'm watching Webb videos. Equally excited.
I am a 58yro now who, in my thirties saw JWT in a red and white suit... In all these years preceding this I could only wish you had the shine of a red nose to deliver sooner. Though I have run out of gas in my enthusiasm I still hope to be amazed... one more time before my experience expires. gl!
Small correction : at 9:38 it’s actually 920 000 not 920 000 000 miles ^^ The latter would put the L2 pretty close to the orbit of Saturn , which would in fact make the janitor’s trip a fair bit longer !
Great interview though !
Ha, "small correction" ... more like order of magnitude correction! Thanks for pointing out.
Thank you! I was confused, "Isn't the sun like 93 million miles??"
@@keppela1 : Actually three orders of magnitude.
You're wrong
@@johndavidwolf4239 Ha, quite right. Good thing I didn't make a video about it : )
Wow! The fact that the telescope is in orbit around the Sun, not Earth and is being dragged along by Earth, is absolutely amazing!
L-2 is such a strange phenomenon to wrap you head around. SO cool.
Sick visualization. + L2 is 1.5 million km from Earth. Hubble is 500km above Earth, the Moon is 400.000 km away.. sick.
Dear Carl i so wished you was still with us all to witness and take part in these adventures of humanities awe-inspiring advancements. We have a long way to yet but having you on board would be awwwsome.
P.S. sharing this clip with my local astronomy club... they'll love it too! (esp. those newer to the hobby).
Considering what we've learned from the Hubble space telescope, I'm excited for the things we could find with the James Webb space telescope.
This is the best program on the Internet, thank you NDT
I’m watching this from Syria
I think so to. Merry Christmas from England UK.
I hope that I will live long enough to see the images that this telescope will capture.
You just have to stay alive for another month. 😉
Actually about 6 months, but still doable
Not if I have anything to do with it.
I’m honesty very happy I get to witness this historical moment in my lifetime
Unless you die before it happens 😔
This is AWESOME. Observation is always the definitive means to gather data. Observation of impossibly distant galaxies, quasars, black holes, and nebula will undoubtedly advance our knowledge of our existence itself.
Thank you for all the enlightening documentaries you are our current Sagan! It is these milestones scientific technical and exploration of space that take humanity forward! And provide prosperity.
I love listening to you talk I fall asleep to the things you talk about so I can dream of the stars
Chuck brings much personality to this broadcast.
He brings the fun by bringing the silliness many people result to with information that flies over their head. But the way the show is designed we don't stay there. Neil is always the to bring the conversation back giving the mind some time to process. It's really a great program they built. Wish i had something like this growing up.
I am soooooo excited about this telescope! As an aspiring ESA astronaut I am proud ESA takes part in this project along with all the other space agencies! 👩🏻🚀
Best of luck on your journey! The only way for meaningful space exploration will be countries working together towards a common goal.
We hope you reach all your goals and more!
This was very interesting. Can't wait to see watch it shows us.
Same here!
Happy retirement ,Mr.Green ! Thanks you for your live`s work ,contribution to our society and helping us answer humanities big questions. Respect and ENJOY !!gonna miss your talks, explaining things as Chief scientist
I’d love to see a comparison of the GNZ-11 image taken by Hubble and see how this farthest known galaxy looks through JWST.
As someone that is aware of their limited knowledge, this is mind blowing!...lol
I can't wait to find out what it's able to see and what we are able to do with that information!
I know I know less than you!!!
Love Jim Greene. Met him at San Diego Comic Con years ago! It was his first time being at SDCC and we were waiting through previous panels and there were hundreds who could not get into the panel because tons were waiting through two or three panels before their panel. I had stepped out to get a pretzel and had noticed him in line because he had his name badge. Nobody knew who he was before the panel. We chatted it up and I talked about how I was a teacher and how big this panel was and he did not believe me. We were supposed to continue our talk after the panel, but he was mobbed by a bunch of people afterwards who suddenly knew who he was. He is a great guy and I wish him well into his retirement.
I love mr. Degrass..he makes all that long head..space stuff super cool..which will help the next generation pay more attention to our inner and outer solar system.
Science talk with a bit of humor, good stuff and much appreciated. Thanks.
I'm excited for all the stuff we are not expecting to find. Can't wait to know 6-7 months from now.
Multiverse CONFIRMED!
Dr. Green, your NASA Citizen Science video is one that I play for my students and at my guest speaking engagements, when I talk about citizen science. I'm sad you're retiring but that video will continue to be shared by me. Thank you for your service to NASA and thank you for what you've done for Citizen Science. I hope you enjoy retirement, it's well deserved. 😢
Their candid humor is infectious! I'm gonna make a playlist and binge watch later on.
I watched the launch live on christmas morning. My heart was in my mouth!
Hopefully it wasn't added to the menu though 😅😅
If you were watching Fox News at that moment, they were talking about Christmas cookies and didn’t even cover the launch.
@MGR1900 😂 no one watches Fox
I love everything about this thank you 😩💓
Just setup a station or port at each of the Lagrange points and you can service the telescopes with the engineers that stay on the bases there. Also you could start experimenting with the construction of space capable craft to transport cargo between the other Lagrange ports/stations, and eventually we can begin building our planets first "enterprise"/ capitol ship. Just a thought.
That would be an engineering marvel in it’s own right. First we would need rockets capable of going multiple trips in and out of space with little maintenance once returned. Only few rockets like SpaceX currently have the ability to go into space and land back in one relative piece. Also the payload to travel to Lagrange point 2 and back would be immense. Next you would need the time to train engineers to go into space and service the telescope. Not only would they need to be knowledgeable with the telescope but also train for outer space. All this would require a buttload of money for little to no reward. NASA was using chunks of its budget just to build this thing. If NASA really wanted to keep the telescope in operation after the ten years then someone would have to take one for humanity and science and sacrifice themselves on a one way trip to refuel the JWST. Which, in all honesty, is not a bad way to go out. Unless, NASA or private space exploration companies can come up with a rocket capable of getting to L2 and back. Easier said than done.
In reality, no $ incentive for anyone to do it.
I love how he explains things.
I’m so hyped up the new possibilities that human kind are going to see
And the fact that we are in the infant stages of space exploration. Crazy where it will be a long time from now
Glad l found you still doing STARTALK. Used to watch you on television. So l had to subscribe. Your friend from Simcoe Ontario Canada
I'm so excited for the James Webb Space Telescope!!!!! I can't wait to see what it see, and what we can learn from the images. Exciting times!!!
@@weathergirl369cloud Thanks for the inside!
Don't get too excited going to be the same images like hubble
@@next-gen-gamer2715 Lol
@@Mikhail-Tkachenko I mean he isn't wrong ill wait to be proved wrong but there is a point of diminishing returns and any science that is actually relevant
Just so glad it launched ok.
Don’t know when it will get to its destination and it has 6 months of testing.
Fingers crossed because I can’t wait to see what it can find out.
it takes about a month to get to its destination.
Imagine we point the JWST at the same empty spot the hubble did, and there's even more galaxies between the ones hubble found
They should do it actually.
Likely going to do just that since it's meanto prove whether there IS more
Or aliens trolling us 😎
Then there are a few 100 million more
Is that a big deal? Not really
Better look at planets that are closer,
So they can find live
Nasa wasting so much time and money on missions that are useless, just like mars , how many rovers? On a dead planet where you find nothing, just dust and sand , what a waste,
@@promo130 Fair enough lol. Only if they have spare time. Closer planets are a better use of time. But I disagree that Mars is a waste of time
I just wish to say something here.
I watched the launch of JWST live on NASA's UA-cam channel.
I've been waiting for that launch and deployment for a long time, ever since I've first heard of this project back in the late 90's...
This year, I've spent Christmas alone.. but I didn't regret it.
I did not, because I know, I watched one of the greatest moments in Human History unfolding in front of my eyes.
It felt like a Christmas present.
It was a perfect launch and what a view it was when the first sunshield unfolded and the first rays of the Sun covered the the spacecraft in a glory of light..!
And then I saw something, I still can't believe...
Sure, it wasn't the first time...
But this time, it was different.
First, I saw only one appear in the far distance...
Then came a whole swarm of it.
No, it wasn't ice.
I've seen hundreds of launches in my life, most of them live.
I know, how ice can be built up on spacecrafts and rockets and what happens at separation, how those ice particles move and at what possible trajectories they follow.
What I've seen now, was something totally different.
No, not satellites.
Satellites have fixed orbit, occasionally adjusted to avoid collisions with other space objects. Their speed is fixed and constant, so is their orbital track...
What we've seen here, are not from this Earth.
A launch like this had attracted the interest of many.
Not only us, Humans.
Soon, the Time is here, when all shall be Revealed.
Hi, are you guys going to be keeping us up to date with any news from the James Webb telescope. I for one would like that, Thank you x
Hi Neil!
The JWST is gonna be a fascinating technology. Looking forward to expanding our knowledge about the universe we live in. First of all, I let you know that I am deaf and wants to thank you for making this video in English caption. Without this caption, no knowledge will be provided. Again, thank you.
Now about the JWST, I’m so curious 🧐 to know if this new space telescope 🔭 can or can’t find the Voyager1 & 2? Still thinking 🤔 that these Voyagers might be too small for us to see them & possibly way too far away. Let me know what you think 🧐. Many thanks for your time to read my message & question.
The aperture to distance ratio in the case of the JWST and the voyagers is ginormous, like many kilometres.. So ig for JWT to resolve the two interstellar travellers will be next to impossible. Hope this helps!
@@Cococosm
Greatly 👍🏽 helpful. I’ll be surprised 😮 if JWT can follow the trail that the Voyagers left behind & trace them. But if that’s impossible, might as well say “Bon voyage, Voyagers!”
@@GComas-jn2yc Gladly 🙏
We can figure out their exact spatial position based on their planned trajectories, but seeing them in motion virtually can be tasking with (at least) these optical telescopes.
Hi 👋🏽 again @jahvni Singh,
I been seeing reports saying that the Hubble Telescope is now helping the disabled JWST. How is that possible?
Can't wait to see what they find. Hubble was amazing but this is exciting for an old geezer like me that grew up watching the first astronauts ride into space.
Wish I could have seen that first hand
Are we the public going to have immediate access to all the images once James Webb comes online? Very excited to see what we’ve never seen before!
NASA has set up 4 “early release teams”, one for each instrument. The goal is to get the first data out to the public within 6 months - if all goes well.
Since we have control over the Hubble telescope and we're waiting for JWST to unfold. Could we not use the Hubble to observe JWST unfold "live"? Tracking and continuous focus could be difficult but possible no?
I love listening to Neil so much. I try to watch everything he does. What are we going to do when he’s gone one day. Who’s going to replace him. I don’t see anybody being able to connect with people there he does. Not looking forward to that day hopefully we have many more years with him
You might be gone before him, you never know.
He's especially good when he chimes in at Christmas *actualy*-ing and killing the Christmas spirit.
Jim Green's explanation that the L2 Lagrange point is "behind" the earth was confusing. I kept trying to picture the point following along Earth's orbit, trailing our planet by a million miles. Mr. Green didn't say that the LaGrange point was "behind the Earth from the Sun's point of view." That would have been much clearer.
If anyone else was confused, it helped when I found it was actually a million miles further out in space outside of our orbit. Another way I thought of it was "a million miles to the left. Permanently."
He is mistaken on the position on L2, it is actually beyond the moon. L1 is between the earth and the Sun.
Ya he goofed there big time
Chuck you were great on this one!
I’m so excited about this telescope! The images promise to be amazing! Love you guys Dr. Tyson and Chuck nice. Good looking men
Yes my excitement is growing exponentially the future is ours to see and the past it will be good to have our baby pictures all go James Webb all go us
I cant wait to see the images it will send back. I hope it finds something amazing which no one knew about. Best of luck NASA
Love your content! I have a question that I hope makes its way to Neil. Let's say we are out in space, one astronomical unit apart. We race toward one another, each of us going 99.999% the speed of light. Would we ever see each other coming? Would the collision be a one that's nearly 200% the speed of light? What if we raced toward one another each at say.. 50% of the speed of light. How does relativity work here?
It would probably look like your friend's up scaling from a point and getting bigger.. I think it depends on reaction time... If you had the reaction time at the speed of light your eyes would be able to obsorb light and the brain compute what's happening before you both collide if you lower to about 50 percent your brain would compute the light information easier also the better your reaction time the slower something appears to move... Id like to know Neil's view also but you'll have to become a patreon fan
Man I'm actually really really excited to start seeing the photos from James Webb
Neil would you please do a segment on "Nutrieno's" ? Given all of the studies and info gleening around the World, where do we stand on the understanding of these invisible forces ?
Perseverance Mars Rover is still my top 3 favourite Star Talk episode.....welcome back Jimmy!!!!!
Dang, since 2007 they’ve been thinking and planning on this telescope. Amazing.
earlier than that even!
1996
2007 was their original launch date i think. XD
I'm in suspense over the launch tomorrow🤔
That thing is so intricate in unfolding for operation at the LaGrange-Point that I hope it goes up & deploys without incident🙏
I know people who worked on it.
20+ years ago actually, before Hubble had even launched.
I like your videos where you are the only one in them. You do great on your own.
What a fun & interesting podcast/show. Thank you
Great request from Neil. A lot of our greatest discoveries came at times we were not looking or looking for something else. It's probably hard to get that sold when you're on a multi billion budget, but I hope they'll get some time to freeride to telescope for a while and look at random places where they initially don't expect to see anything of importance.
Neil never fails to impress me!
Fascinating and educational at 1.5 speed!
My son’s on his third year of a UK Physics with Astrophysics Degree very much inspired by Neil deGrasse Tyson. He’d love to work on telescopes or NASA. Any tips? Thanks 🙏🏻
Tyson's explanation makes me feel more enthusiast in science.. Compared to others that makes me sleepy..
Enthusiastic.
Means to be filled with the spirit of God.
There is no god
Most exciting to me will be the spectroscopy of the atmosphere of exoplanets
I would love some graphic references with this video!! Looks great but needs visual cue
Thanks for keeping the humour alive !!!!
I wish this mission and everyone involved in it the best. Thank you for your work.
You definitely need to post a video about the early discoveries
I'm wishing this edition had last 2 hours at least. This gentleman is so kind and such a big deal! Thank you
Hey there, Mariano! The original episode is actually quite long. You can watch it here: ua-cam.com/video/IxKzh6ilMas/v-deo.html
@@StarTalk WOW ! Thanks for your reply ! I'm flattered 😅 Watching the full episode in 3...2..1...
Sir! I have never been happier than today that I have my own personal astrophysicist!! I am anxiously waiting for the explainer about the JWST's deep, deep field pictures showing galaxies that look just like those near us! Not what scientists predicted. Is it true that this disproves expansion? WOW!
It is interesting how they keep calling it JW instead of James Webb even though the latter has less syllables.
We oughta call it "J-dub"!
@@kellyrobinson1780 honestly should be renamed
@@kellyrobinson1780 or "Dubya"!!
@@robblevins6009 No they shouldn't and they're not going to rename it.
It seems they're not such smart guys after all.
This is amazing in so many ways.
Imagine an astroid or some random space thing hits the telescope
Great explainer! Thank you.
thanks Gundam for explain me L2 (and L3, L4 and so on) before this
Imma say: I will not be ok if that thing doesnt go up there smoothly.
Oh do I have news for you
@@hubbleenjoyer800 wait what ? Did something happen?
@@meh895 it went well. I didn't mean to imply an accident, so im sorry if i pulled your leg there. Everything went smoothly and i hope the rest of the operation will as well
I can't wait for it to launch
The discussion of discretionary time is great. Have the ISS crews noticed anything unexpected?
never have I wanted to be friends with people so much! I love these explainers
I strongly suspect that no matter where you look in this universe, you'll find interesting things.
Indeed
@@urduib indeed sucks..I look all over the place and I still get nothing.
@@RatusMax Have you looked under the bed at night ?
where will it go after it runs out of fuel? into the sun or out towards Jupiter and beyond? (assuming it doesn't get re-fueled)? can it still be used while it's no longer in L2?
it'll slowly drift away from L2, and end up in orbit around the Sun.
@@zounds010 thanks, I assume once the cryo fule (?) runs out it will be unusable?
@@Beakerzor mostly, yes. JWST has two systems to control where it's pointed: thrusters and reaction wheels. When the fuel runs out, they can continue observations for a few days using the reaction wheels, but at some point those reaction wheels will reach their maximum speed. Normally the thrusters would then be used to reduce the speed of the reaction wheels.
The fuel is hydrazine. This is not cryogenic: hydrazine is a liquid at room temperature and freezes st +1ºC.
@@zounds010 thanks
Happy New Year Dr Tyson.
Its an exciting time for space exploration!!
Alan Stern is a true legend!
These videos always make me feel so dumb lol. Love watching them!!
will there be a new Startalk updating us on the Webb telescope? or are you holding out for more images?
9:35
Just a quick fact correction for anyone in the comments L2 is 1.5 million kilometers away not 920 million miles
it was honest slip, he meant 920 thousand miles.
When it launched, those mirrors were possibly the cleanest things on earth. Question: Over the 10 years of service planned, do we have to worry about keeping the mirrors clean in space, and if so, how do they do it?
You think there is dirt in perfect vacuum in space where the telescope is? XD there is no dirt where the telescope is floating… probably not even many atoms 😂
@@swlk9996 Sorry, but space is full of dust, it's how planets and stars form. No dust, no planets and stars. And L2 (where JWST will be) is a gravitational 'neutral' point, so dust and debris will have collected there.
@@Chris-hx3om The average density of space in our solar system is 1 atom per cm3. Once our solar system started forming, most of the dust got pulled into them, leaving an excellent vacuum between them.
JWST will orbit the L2 point at a distance where it needs regular use of thrusters to stay in that orbit, so this is an area where dust and debris will not collect.
@@zounds010 So where does the roughly 5,200 tons of dust that hits earth each year come from? (Hint: it's space)
@@Chris-hx3om Let's do the math. Earth has a surface area of 10e21 m2, dividing 5200 tons over that area is 10e-12 g/m2 per year. JWST's surface area is 200 m2, so it will be hit by 10e-10 grams of dust per year. And that's ignoring gravity, which pulls the dust near Earth orbit down to Earth.
Neil, you know, I know and NASA knows...in 7-8 years time they're going to announce a little autonomous robot in what looks like an iron-man suite with ion thrusters in it's heels and a backpack full of ion fuel, which will climb out of the ISS to great fanfare before jetting it's way to L2 with a jerry-can full of telescope fuel in one hand and a feather duster in the other.
It's gonna happen and you heard it here first :)
Funny, I had the same thoughts! 💭
7 years???😍😍😍😍😍😍😍😍
To infinity, and the second Lagrange Point!
I livestreamed the launch ua-cam.com/video/SSOquW8nyFw/v-deo.html please share ur views:)
LOL .... Massimino 2 ... 😜
and don't forget your keys 😀
TY for this broadcast
I work on a tugboat in NY harbor and I love the old school barge drawing behind him.