Unveiling the Oort Cloud

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Today we are doing a deep dive into the mysteries of the Oort Cloud, a distant and hypothetical cloud of comets that envelops our solar system. This spherical region stretches from about 2000 AU to 100,000 AU from the Sun, marking the outermost edge where the Sun's gravitational influence dominates. It's a thrilling tale of dynamics and how the solar system interacts with the galaxy!
Find me: galaxy.nora-bailey.com/linktree/
My paper on "Oort planets": ui.adsabs.harvard.edu/abs/201...
Key Oort Cloud papers:
Leuschner 1907 - Preliminary Statistics on the Eccentricities of Comet Orbits, ui.adsabs.harvard.edu/abs/190...
Öpik 1932 - Note on Stellar Perturbations of Nearly Parabolic Orbits, ui.adsabs.harvard.edu/abs/193...
Oort 1950 - The structure of the cloud of comets surrounding the Solar System and a hypothesis concerning its origin, ui.adsabs.harvard.edu/abs/195...
Hills 1981 - Comet showers and the steady-state infall of comets from the Oort cloud., ui.adsabs.harvard.edu/abs/198...
Duncan, Quinn, and Tremaine 1987 - The Formation and Extent of the Solar System Comet Cloud, ui.adsabs.harvard.edu/abs/198...
Tremaine 1993 - The distribution of comets around stars., ui.adsabs.harvard.edu/abs/199...
Other related papers:
Dones et al. 2004 - Oort Cloud Formation and Dynamics, ui.adsabs.harvard.edu/abs/200...
Brown, Trujillo, and Rabinowitz 2004 - Discovery of a Candidate Inner Oort Cloud Planetoid, ui.adsabs.harvard.edu/abs/200...
Levison et al. 2010 - Capture of the Sun's Oort Cloud from Stars in Its Birth Cluster, ui.adsabs.harvard.edu/abs/201...
Wyatt et al. 2017 - How to design a planetary system for different scattering outcomes: giant impact sweet spot, maximizing exocomets, scattered discs, ui.adsabs.harvard.edu/abs/201...
Baxter, Blake, and Jain 2018 - Probing Oort Clouds around Milky Way Stars with CMB Surveys, ui.adsabs.harvard.edu/abs/201...
Bernardinelli et al. 2021 - A Search of the Full Six Years of the Dark Energy Survey for Outer Solar System Objects, ui.adsabs.harvard.edu/abs/202...
Learn about the Tisserand criterion - farside.ph.utexas.edu/teachin...
00:00 Introduction
00:40 What is the Oort Cloud?
03:06 Orbits Refresher
03:41 Timeline of Oort Cloud Discovery
05:14 What does the Oort Cloud look like?
05:35 How did the Oort Cloud form?
17:31 Oort Planets
18:59 Formation Summary
19:22 Exo-Oort Clouds
21:59 Bye!
#astronomy #solarsystem #space

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28 июл 2024

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Комментарии : 389

@BloobleBonker 4 месяца назад

No-one has ever proved that the Oort Cloud really exists. We just know that it Oort to be there.

@RIp-sz6yn 4 месяца назад

Now THAT makes sense.

@freedomforall4764 4 месяца назад

😂😂😂

@user-mf1xc3zb2t 4 месяца назад

😂

@jellymop 4 месяца назад

Nailed it

@artharrison9586 4 месяца назад

🙄

@hankseda 5 месяцев назад

Nudged by the RU-vid algorithm to the vicinity of the Nora system, I was trapped in her orbit (subscribed).

@garysimon7765 5 месяцев назад

Anton Petrov caught me with space talk. I will subscribe here also because she is talking sense.

@hankseda 5 месяцев назад

@@garysimon7765 Anton is great 👍

@Deloneys 5 месяцев назад

Facts

@nixdorfbrazil 5 месяцев назад

me 2. very well put !

@electricearth1101 4 месяца назад

The Firmament (upper sky) is made of water and the government does not want you to know.

@alexanderalza7964 4 месяца назад

You had me at "a cloud of oorts" 😆

@brycefelperin 4 месяца назад

I really love enthusiastic RU-vidrs. Enthusiastic, smart and scientific RU-vid channels are the best. Subscribed!

@paaabl0. 6 месяцев назад

This channel is so underrated, I am guessing it is going to skyrocket soon

@NorasGuidetotheGalaxy 6 месяцев назад

🤞🤞 We'd love to see it!!

@KF-bj3ce 4 месяца назад

I just love smart people that can give you a RU-vid presentation without background noise and very clear speaking. Thanks so much.

@XKathXgames 4 месяца назад

This was great! Can't believe I hadn't found your channel before. Subscribed now!

@mikeottersole 4 месяца назад

Big planets kicking rocks around. Neat description.

@mikehalonen305 4 месяца назад

I've been into astronomy since I was a child, so 30 yrs +. Love this video I could listen to you explain space all day.

@dreadogastusf3548 4 месяца назад

By the end of the video, I can say that it's a win-win experience. Nora gets to nerd out. And I get my vague knowledge of the Oort cloud brought into focus by her detailed explanation of the entire process. Many thanx. *subscribe*

@lorensims4846 5 месяцев назад

This is fascinating and delightful! It reminds me of an Advanced Topics in Astronomy class I took during my second year in college. It was taught by the head of the department and his enthusiasm was contagious. As with this video, there was no math requirement, but he occasionally would put it up on the board just to show that it works. We only dealt with stars, not "rocks" as he called them. We got so much history and cutting-edge theories, I felt that he gave me my religion. I still have tapes of some of his lectures. Thanks! I'll be back!

@NorasGuidetotheGalaxy 5 месяцев назад

Thanks and welcome!

@mosiprop 5 месяцев назад

Great video!! Even though I have a degree in Physics and have been a long-time astronomy enthusiast, I've never heard such a clear explanation of the Oort cloud, and the celestial mechanics methodology used to determine its properties.. and be delivered with such joy. Very well done! Thanks, Nora! You earned my subscription.

@NorasGuidetotheGalaxy 4 месяца назад

That's so kind! Thanks and welcome!

@RuminatingWizard 4 месяца назад

You mean that thing that doesn't exist? 😂

@ghpeakfitness3813 4 месяца назад

Yeah no kidding, straight up, I love the enthusiasm, I have no degree, I'm a simple tradesman, but I've always loved astrology...anyways, yeah the enthusiasm was awesome, it got me right into the video lol

@Palimbacchius 4 месяца назад

@@ghpeakfitness3813 "I've always loved astrology" -- then you're in the wrong place.

@skweetis 4 месяца назад

Excellent and enlightening discussion of the subject. Although I remember learning about the hypothesized existence of the Oort cloud and its relation to comets as a kid, I'd never stopped to delve into the physics which could lead to its formation. It makes me think about the recent visit of 'Oumuamua, and how we've only had telescopes capable of detecting objects like that for a few short decades. It is doubtless that all kinds of space detritus like 'Oumuamua has visited our solar system from other stars, thrown our way by these same processes, while our former neighbors are out wandering the galaxy in turn. Fascinating stuff! Makes me feel small and full of awe at the scale and complexity of our universe.

@JayTee78NIN 4 месяца назад

Your videos are very organized and you are a very prepared person. I had to subscribe. Thank you for your hard work and your passion for the cosmos.

@NorasGuidetotheGalaxy 4 месяца назад

Thanks and welcome!

@-MaXuS- 5 месяцев назад

What an amazing surprise treat of a video! 👌 Super fascinating content! A definite subscribe. ✌️🖖

@henrytjernlund 4 месяца назад

Great video. Thank you.

@timmccaffery4826 4 месяца назад

Always love your shorts. Deeper dive is very worthy for the Oort bodies! I'm more of a statics guy so very humbled by someone who digs the uber complicated dynamics field! LLaP

@NorasGuidetotheGalaxy 4 месяца назад

I love it and yet am constantly humbled by it as well!

@welingkartr416 4 месяца назад

Nice! I wondered about the Oort cloud and saw an article about a recent paper where they simulated motion of stars in the neighbourhood coming close every 70K years or so and causing changes in the inner solar system. Your description was quite helpful, though I could figure that there's some uncertainty given so many factors that influence this dynamic system. Thank you.

@RodneySandwhichez Год назад

This was absolutely fantastic. I had to stop several times and look some things up. Great material and what a deep dive on this.

@NorasGuidetotheGalaxy Год назад

I'm so glad you enjoyed it, and that it sparked additional learning! 🧡

@matthiasmartin4355 Год назад

Thanks for sharing your knowledge with us!

@paulcooper8818 5 месяцев назад

Informative well presented hypothesis. I had incorrectly assumed the Ort Cloud was within the heliopause (not paying attention to the numbers). 2000 AU almost seems accessible compared to 100,000 AU, pretty thick.

@zoltanposfai3451 4 месяца назад

The Oort cloud is like the interstellar transit section of a galactic spaceport. Object check in, check out. Some stick around before going home. Others get on long-haul orbits and end up in other Oort clouds. Where they may or may not stay.

@WWTormentor 4 месяца назад

I’m glad that I found your channel. My 14 year old daughter has always loved science specifically math, physics, and astronomy. When she started her freshman year in high school back in a august 2023, she met with her counselor and informed her that she wanted to go to Caltech and study physics and astronomy. Her counselor told her that only boys go into the field and she should reconsider. This devastated her. So, since then I have been looking to find channel or females in science for her to watch and realize she can always do what ever she wants regardless what others think. We have subscribed and eagerly looking forward to see all your videos.

@ambermartin3961 4 месяца назад

Do we still have that ridiculous misogyny going on? 😢

@WWTormentor 4 месяца назад

@@ambermartin3961 apparently. I was shocked myself when I heard it. If I wasn’t there in the meeting with her, I would have assumed she misinterpreted what the counselor told her.

@ambermartin3961 4 месяца назад

@WWTormentor I wish I could parade all of my women in STEM students in front of him, each giving him the scientific data on how women perform at least as well as men do in science and math in places where they don't face discriminatory crud. Ooooo, I'm all angry on your daughter's behalf.

@nocturnalmayhem0 4 месяца назад

id go to the school board about that.

@WWTormentor 4 месяца назад

@@nocturnalmayhem0 here in Los Angeles where the school board is corrupt and controlled by the liberal left wing? Good luck with that. Instead I pulled them out of Public school and sent them to private school.

@nicksellman6661 4 месяца назад

Space really is the push, pull, and wait game played at insane timescales.

@peopleseethis 5 месяцев назад

Great channel you got here! Subscribed.

@nirorbach8046 5 месяцев назад

Arranged my intuitions around this subject I didn't have the words so thanks for this interesting video 🙂

@Klaus293 5 месяцев назад

Wow! Nora, I’m so pleased to have found your channel. Excellent and I’ve subscribed.

@NorasGuidetotheGalaxy 4 месяца назад

Thanks and welcome! 😊

@PhilGartman Год назад

I love, love, love this video. I've heard about the Oort Cloud but usually only in passing. This is the first time I've gotten an actual explanation of what it is and how it came to be. So thank you!

@NorasGuidetotheGalaxy Год назад

Glad you enjoyed it! 🧡

@bryandraughn9830 Год назад

I truly appreciate the detailed explanation. Sometimes I would learn a vague description and I've always wanted to know more about how the Oort cloud was formed. Great video!

@NorasGuidetotheGalaxy Год назад

Glad to hear it! 🧡

@videosight1 4 месяца назад

This was great, thank you

@jamesbest2221 5 месяцев назад

This was interesting! Thank you. You have a perfect pace through the information without fluff.

@NorasGuidetotheGalaxy 4 месяца назад

Thank you, glad you enjoyed it!

@nomdeguerre7265 5 месяцев назад

Excellent synopsis of current hypothesis and theory of the Oort Cloud! I find this one of the most interesting areas of the Solar system. With GAIA data it seems even more interesting, considering astrometry suggesting a near pass by Scholz’s star a mere 70k ya and a possible near pass by GJ 710 in a mere ( 😉) 1.5m years from now. Great presentation.....

@NorasGuidetotheGalaxy 5 месяцев назад

If only I'd be around to see it! 😭

@PraveenSrJ01 15 дней назад

You have a whopping 592 videos on astronomy topics which is really cool. Plan to watch about 20 this year in my spare time.

@NorasGuidetotheGalaxy 10 дней назад

Welcome! Some are much longer than others 😂

@user-lp2ix4sr7m 4 месяца назад

My friend Dr. Walter J. Wild and I, when we were students at IIT in the 1970s, used IIT's PRIME computer to do the 3-4-5 3-Body problem numerically, and one of the masses got shot away from the two that ended up (after an extremely complicated dance) in orbit. I'm glad I found your RU-vid channel, and, if you don't mind my saying so, I think you are a great lecturer. BTW, although it deals with inverse light curve imaging of Pluto, rather than celestial mechanics, you might be interested in a paper Walter and I, et al published in ICARUS in the 1990s: "Images of Pluto Generated by Matrix Lightcurve Inversion". So, I think you are great, and I'm looking forward to watching more of your lectures.

@erasmuus 4 месяца назад

Your joy and passion for the subject is infectious. Subscription heartily earned. I look forward to further deep dives!

@StephenJohnson-jb7xe 4 месяца назад

Fantastic job, simultaneously very informative, well explained and done in a very engaging manner.

@marianneb.7112 4 месяца назад

Thanks, Nora! Very interesting! New sub here. I came from Fraiser Crane's channel today.

@lambeausouth1 4 месяца назад

Nora I love your approach to teaching us about science and specifically the the Oort cloud.

@Luke1959 4 месяца назад

Great video, totally presented with passion and knowledge!! Keep it up, Nora! Subscribed👍🥳

@idlikemoreprivacy9716 5 месяцев назад

Awesome presentation, most useful concepts to go beyond non-astronomers very naive and impractical description of astral bodies' movement. I studied physics but struggled to understand how the moon moves. Extra points for making the ideas so clear using no math. Chapeau!

@anderssundin354 5 месяцев назад

Just found this channel. Nora, you're a great lecturer, can't wait to watch more of your stuff. Great video!

@davidcadman4468 4 месяца назад

As a wandering planet without a sun, I was passing by the Nora Sun and was captured by her gravity, Now I will be orbiting her warmth for eternity... Subscribed.... Thanks for an interesting subject...

@SuneOne23 Месяц назад

Great video. Very informing with data and examples.

@despowell2015 Год назад

So great to re-discover/re-connect with your awesome channel👌what a wonderful deep-dive into this fantastic subject🥳 looking forward to more!! 💫🌌🔭🛰️🪐🌝

@NorasGuidetotheGalaxy Год назад

Thanks and welcome (back)!

@carloscedillo5081 5 месяцев назад

Love it !! … excellent explanation

@robertrohler3644 4 месяца назад

"A cloud of Oorts" what a hoot! That was funny :)

@vblake530530 4 месяца назад

Doc. You are REALLY enjoying this stuff. I’m confident you and folks like will figure it all out, cause you lost me back around 11:49

@bagfacedog 4 месяца назад

Outstanding content and presentation. Subscribed!

@mysterirhys 5 месяцев назад

Amazing that so much is ‘known’ about something that has never been seen, visited, or…anything. Thank you for admitting that it is only hypothetical.

@NorasGuidetotheGalaxy 4 месяца назад

Yep, sure is great that science can help us make sense of the universe based on evidence!

@mysterirhys 4 месяца назад

@@NorasGuidetotheGalaxy a few long period comets falling in toward the sun is hardly evidence for the purported ‘cloud’ you’re claiming to be out there. The Oort Cloud is still just a theory

@bigedslobotomy 4 месяца назад

What I find interesting about the Oort Cloud theory is that in science, first you have to hypothesize that something exists before other scientists start to look for such objects. A lot of the “proof” behind these Oort objects is their highly eccentric orbits that are outside the solar plane. They will be exceedingly difficult to prove because of their great distance, their large number, and small size.

@zen1647 4 месяца назад

Have you ever seen an electron? Lots of science is based on very careful, systematic indirect observations. Love it!

@timothyskattum950 4 месяца назад

Absolutely brilliant in the simplicity of your vibrant and beautiful explanation. Love your “inner” fire. Interesting though, that the timelines involved are not easily understood. I mean, your talking about “passing stars” which is such a gigantic time scale. I mean the trifecta of our three closest stellar neighbors has been nearly imperceptible in their movement in our observational timescale. One brilliant fact you mentioned is the scale regarding V1 and V2 and their travel periods. Whoa, when truly considered. 😍

@MrGaborseres 4 месяца назад

Thank you Miss Nora 🌹 that explains it 😊

@zweibrucker 4 месяца назад

Thank you Nora for dumbing this topic down so I can deal with the information rush.

@user-np6gw4qv6o Год назад

Not very many channels talk about the Oort cloud, Sea did one a long time ago, so it's always great to hear about this subject from another channel. Thanks for the explanation.

@NorasGuidetotheGalaxy Год назад

Glad you enjoyed it!

@rezaj4724 4 месяца назад

You explain very well and you are so adorable. ❤

@sandrokostic6008 4 месяца назад

Ah, another grain of knowledge for me. I'll take it, thank you, subscribed. 😊

@johngrundowski3632 4 месяца назад

Great subject ; good depth of info .🌌 thanks

@PraveenSrJ01 15 дней назад

Thanks for the video about talking about the Oort Cloud ☁️😇

@clairecelestin8437 4 месяца назад

I loved the video, and I loved the enthusiasm! I have one question... If post-scattering orbital parameters have eccentricities that are asymptotic to 1, how are objects ever scattered into parabolic or hyperbolic trajectories to escape the system? I'm assuming the equation and asymptotic behavior are a special case emerging from the restricted circular 3 body simplifications, and that the real chaos has less neat and more yeet. Still, I'd love to hear the proper answer. Thank you for the great content! I've subscribed, and I'm looking forward to perusing your library.

@royfeely7145 4 месяца назад

That was very interesting and I love your enthusiasm. I didn’t understand 95% (or more) but at least I have a vague idea what the Oort Cloud is, (if it exists! LOL)

@sonarbangla8711 5 месяцев назад

Excellent video, very informative and provide insight into our solar system.

@TradinTigerJohn 5 месяцев назад

Outstanding presentation Nora! The definition of "solar system" is indeed non-trivial. I often think of an "orbit of Neptune" picture, but a heliopause or better still, Hill sphere definition arguably makes far more sense. And just as the sun represents a stunning 98.8% of the mass of the "orbit of Neptune" solar system, so does the Oort Cloud represent an equally stunning (estimated) 98.8% of the mass of the "greater" solar system! Wow. IDK if those mass proportions are a coincidence or an actual Law of Nature. In any case, what a lovely, clear picture you've painted of our complex, dynamic and many-faceted solar system. Like? Check. Subscribe? Check! What a nice reminder that grad school is where learning *starts* !!! :)

@ecu4321 4 месяца назад

Curious why haven’t we seen an oort cloud on otter star systems?

@Petertronic Год назад

This is a great video, learnt a lot!

@NorasGuidetotheGalaxy Год назад

Glad to hear it!

@justmeva 4 месяца назад

Thank for this very interesting take on the Ort Cloud. You really lost me for a while there until your relation to the technical "puffy" term!!! 😉

@PraveenSrJ01 15 дней назад

Thank you so much for making the video and I loved learning about the Oort Cloud ⛅️ even though some of the higher level math 🧮 bypassed my head.

@PraveenSrJ01 15 дней назад

Loved 🥰 your video so subscribed to your channel. I really love learning and studying astronomy 🔭

@spraudoggy 4 месяца назад

Would like to have had her as a science teacher. No problems paying attention. Good job.

@yggdrasil9039 4 месяца назад

Thanks for the video and crystal clear explanation on one of my favourite topics. In a RU-vid universe of AI-generated videos it's great to see a fellow human presenter

@jk-video2716 4 месяца назад

One thing that most people have no idea of and it is a bit misleading to have it named cloud is this - how far apart would the average comet be from its nearest neighbor. Same question would apply to Kuiper belt and the asteroid belt. They are invariably drawn as if they are crowded, but the distances involved are pretty high. Maybe a video just on this topic?

6 дней назад

Due all respect Dr. Nora, you're beautiful. I love your content, very illustrative.

@deronjohnson6224 28 дней назад

Fun discussion!

@fortybelow1973 4 месяца назад

Test on Tuesday..... 😂. Great presentation of, to me, an obscure topic. I subbed. 😊❤

@johnjoseph9823 4 месяца назад

cool video thank you Love it

@johnnyboy-f6v 5 месяцев назад

30,000 years for Voyager to just get to the inner Oort cloud and 77,000 years to exit the outer. Wow!

@NorasGuidetotheGalaxy 5 месяцев назад

Space is big!!

@sonarbangla8711 5 месяцев назад

Next time humans try new voyager type probe will be from China. It will cross the 77000 years limit in no time.

@ninadgadre3934 5 месяцев назад

@@sonarbangla8711what would be the mechanism to attain the high velocities?

@sonarbangla8711 5 месяцев назад

The Chinese has devised many propulsion technics.@@ninadgadre3934

@liquidpatriot4480 5 месяцев назад

@@sonarbangla8711🤣🤣🤣

@tibodeclercq2131 Месяц назад

When our distant ancestors (70k years ago) watched the nightsky they saw a new star, which was actually a binary system of a red dwarf & a brown dwarf, and it passed through the oort cloud. We still need to see the comets it disturbed. In the near future a new wave of oort cloud comets could arrive.

@Gin-toki 4 месяца назад

Thanks for this really informative video ^_^ I've never heard of the "Tisserand Relation before" but that word made me giggle, because in my native langauge, Danish, "Tisse" means to pee and "rand" sounds similar to the word "Rende" which is a gutter. In the olden days, people would often pee in the sidewalk gutters or empty their nightpots into them, thus they got nicknamed "Tisserender" xP

@NorasGuidetotheGalaxy 4 месяца назад

That's an amazing fact and I wonder if Tisserand ever got made fun of it for it! He was a French astronomer so I imagine he knew a few Danes in his day.

@dropshot1967 4 месяца назад

That is a very cool explanation. new sub and suggested for recommendation on Fraser Cain's channel.

@jroar123 4 месяца назад

The Oort Cloud makes sense. As our solar system travels around the Milky Way galaxy, (450,000 miles per hour (720,000 kilometers per hour)), it's bound to bump into space rubble, which forms the Cloud.

@PraveenSrJ01 15 дней назад

There is tons of rubble in the infinite ♾️ vastness of outer space 🪐

@jroar123 15 дней назад

@@PraveenSrJ01 where some see rubble, I see minerals, metals, precious stones, and more importantly, H2O. We should go to Mars after the moon to look for what we need to survive there (H2O). If we were to find vast underground lakes, we would have hit the jackpot.

Год назад

Thank you Dr. Bailey. I know you said we could read your paper in the video. But I don't see it linked. I make no promises that I would understand it (my undergraduate physics was in the 90s), but I'd like to make an attempt.

@NorasGuidetotheGalaxy Год назад

Whoops I forgot to link mine!! 🤦‍♀️ I've added it now!

@davedsilva 4 месяца назад

Came for the jokes. Stayed for the astronomy class. New subscriber.

@quellenathanar 4 месяца назад

I've never liked the concept of the heliopause being the boundary that defines interstellar space when we have (most likely) the Oort cloud defining the limit of our star's significant gravitational influence. I think some people like the idea that "we" have reached interstellar space. Sorry, we haven't earned that status yet... in my opinion anyway. Unless you want to count radio transmissions.

@NorasGuidetotheGalaxy 4 месяца назад

I agree, but I am biased as a dynamicist!

@MrFiddler1959 4 месяца назад

Great video! But now I’m wondering - what would an ejected planet look like?

@robertvirnig638 4 месяца назад

This seems to imply that interstellar space contains more objects of various sizes than I've been led to believe from my limited knowledge of astronomy and the huge amount of sci-fi that I've read.

@NorasGuidetotheGalaxy 4 месяца назад

Space is very very empty and yet actually not very empty. There is a lot of stuff out there, but there's also a lot of space between that stuff. Even in the Oort Cloud, it's expected that the average distance between large comets is about a third of an AU.

@robertvirnig638 4 месяца назад

@@NorasGuidetotheGalaxy Right, I'm just thinking of all the sci-fi that assumes a ship could safely travel at a high percentage of the speed of light for interstellar distances without hitting anything. I would assume anything bigger than a grain of sand would seriously damage if not destroy such a ship. Not to mention FTL ships which if they can have an impossible drive they can have impossible deflector screens.

@maru-yay Год назад

Thanks for the comprehensive explanation, I've heard the term Ooort Cloud before, but had no idea what it was. Have you done a video on the interstellar medium before, too?

@NorasGuidetotheGalaxy Год назад

Not yet! It's honestly not my favorite subject (I've said it before, but I once heard it called the "interstellar tedium" and that felt...accurate), but there are some pretty interesting aspects too!

@picasso5168 5 месяцев назад

Could you do video proxima centuri star system

@blackfly56 4 месяца назад

The Oort Cloud made it kind of gloomy yesterday as it’s darker and greyer than the other nice white puffy clouds that were lazy rivering over my backyard.

@duncanclews9424 Год назад

you are the bomb !! .. keep up this magic :)

@ScrotusXL 4 месяца назад

It's there, but where is there? Ooh it's a bit spooky that Oort thingy 😮

@mikgol81 4 месяца назад

i love how you use au consistently to keep distance in perspective, and au is the best country

@goldwingerppg5953 4 месяца назад

Does the Oort Cloud eject or attract more comets/ space objects?

@ZoroasterIsMyCopilot 4 месяца назад

That was a wonderful explanation of something I thought was a lot more theoretical and less understood than it really was. Thank you for a thorough and yet accessible explanation -- that hits my geeky sweet spot. One question -- and I apologize if it's already been asked and answered below --- in the graphic showing the extent of the Oort Cloud, Alpha Centauri looks like it comes close enough to the cloud's outer edge to have a strong effect. What has that done to the shape or structure of the cloud? Thank you and I really enjoyed this.

@NorasGuidetotheGalaxy 4 месяца назад

Good question! Alpha Centauri is still pretty far, so I don't think it's having a large effect on the Oort Cloud. It is getting closer, though, and as it does it may affect some of the comets within the Oort Cloud, either sending them into the inner solar system or ejecting them from the system. I don't think it's expected to get so close as to be hugely disruptive.

@luckybarrel7829 4 месяца назад

Can you explain what gravitational effects predict presence of Planet 9?

@mrfranksan 4 месяца назад

There's a big gap between the kuiper belt and oort cloud, right? Why?

@GAMEGODFLUENT 4 месяца назад

Awesome video, thanks for kicking some good knowledge about the Oort Cloud! Quick question though. You didn't mention anything about how many comets are actually thought to exist in an Oort Cloud. What would the density of comets be like in our own Oort Cloud, in terms of miles or kilometers between potential comets that exist in the Oort Cloud? How thick of a cloud is it in other words, any numbers there yet? Thanks again, super interesting stuff!

@NorasGuidetotheGalaxy 4 месяца назад

Good question! Very roughly estimated to be ~1 trillion (10^12) comets in the Oort Cloud. Which is a lot, but it's also a huge volume, something like ~4 trillion cubic AU, so the density would be really low, averaging about 1.5 AU between comets if we assume they're evenly distributed.

@t47351 4 месяца назад

Wow ❤

@eastafrica1020 4 месяца назад

So what is the difference between the Kuiper belt and the Oort cloud?

@ninadgadre3934 5 месяцев назад

Yay new space creator

@robertrohler3644 4 месяца назад

Will the Oort cloud gather to make a mass (i.e. planet)?

@xeanilshutes6485 Год назад

those posters in the backround are SO COOL! Where did you get them?

@NorasGuidetotheGalaxy Год назад

Thanks! They are from the NASA Exoplanet Exploration office. You can download them and print them yourself from exoplanets.nasa.gov/alien-worlds/exoplanet-travel-bureau/, but I got these ones in person during my stint working there.

@ZenPepperClub 11 дней назад

Great explanation Even a layperson can understand

@thewellsianpodcast Год назад

How might this all change when factoring in the supposed Planet X that may be in the solar system, or is that no longer a thought? Read about it somewhere recently. Thank you.

@NorasGuidetotheGalaxy Год назад

Planet 9 is too small to really affect the Oort Cloud, though it could help perturb some of the Oort comets into the inner system.