Could humans ever travel to other galaxies within their lifetime? The immense scale of the Universe seems to prohibit such voyages, after all the nearest galaxy is so far away that it takes light itself — the fastest thing in the Universe — 2.5 million years to complete the trip. Remarkably, there is a trick that might allow humans to accomplish this feat — join us today as we step onboard the constantly accelerating spaceship!
Written and presented by Professor David Kipping.
You can now support our research program and the Cool Worlds Lab at Columbia University: www.coolworldslab.com/support
Chapters
0:00 — Prologue
2:57 — A Journey to Alpha Centauri
11:27 — Returning from Distant Shores
21:12 — Onward to the End
Согласно теории хаоса, детерминистические системы могут быть непредсказуемы. Мы знаем все законы физики, которым они подчиняются, тем не менее, мы не можем точно рассчитать их поведение в будущем. Небольшие неточности и погрешности в расчётах накапливаются, усиливают друг друга, раз за разом приводя к вычислительной катастрофе. Будто взмах крыльев бабочки в одном полушарии стал причиной торнадо в другом. А ведь таким системам не обязательно быть очень сложными, достаточно всего трёх элементов. Так возможно ли вообще что-то предсказать?
Перевод: Алексей Малов
Научный редактор: Леонид Вокин
Редактор: Елена Смотрова
Озвучка: Вадим Казанцев
Монтаж звука: Андрей Фокин
Монтаж видео: Джон Исмаилов
Обложка: Андрей Гавриков
Oleksii, Mikhail Stolpovskiy, Ігор Дорохов, Кирилл Басалык, Boris Bendikov, Dina vysotskaya, Sergei W, Михаил Панькин, Felix Kosoy Максим Sheridan Горлов, Anton Makiievskyi, Vladimir Grachev, Denis Titusov, Spartak Kagramanyan, Dmitriy Omelyansky, Konstantin Pesyakov, Olga Shistareva, Alex Katkov, Yehor Melnykov, Alexey Kukushkin, Пугачёв Пётр, Viktoria Kamerton_440 Alexandr Globov, space monkey, Vladimir Goshev, Fleur Gai, Vladyslav Sokolenko, Елизавета Pavel D, Иван Дьяченко, Olga Podolskaya, Yevhen Aleksei Masliukov, Eugene Tsaryk, Vladimir Gavriushov, Maria Burtseva, Aleksey Sazonov, Irina Shakhverdova, Anton Bolotov, Evgeny Vrublevsky, Katya Prokopchuk, AlterienСайт студии: vertdider.com
If Earth Stopped Rotating For a Second | Larry King Now — Ora TV
Astrophysicist and science commentator #NeildeGrasseTyson takes questions via social media.
Were Earth Unplugged and we make videos about the incredible natural world and the animals that live here — exclusively for YouTube. From animal behaviour in slow motion, educational videos, expedition films and beyond we’ve got you covered. Our planet is mind-blowing. Join us as we explore what it has to offer.
Want to share your views with the team behind BBC Earth and win prizes? Join our BBC Studios Voice: www.bbcstudiosvoice.com/register
This is a channel from BBC Studios, trading as BBC Studios, who help fund new BBC programmes. Service information and feedback: www.bbcworldwide.com/ContactWizard
The Earth spins on its axis, completing a full revolution every day. By why does it do this? One of the most common misconceptions in physics is the belief that constant motion requires a constant force. So many people believe there must be some force in the Earth (e.g. gravity, centrifugal force) that keeps it spinning. In truth, no force is required because a fundamental property of mass is that it maintains its state of motion in the absence of external forces. This property is called inertia.
Centripetal force is needed to keep things moving in a circle. And why dont they want to? THEY JUST WANT TO GO IN A STRAIGHT LINE. REALLY. THATS ALL EVERYTHING WANTS TO DO.
P.S. If you have a masters degree or PhD in physics and would like to talk to me about rotating reference frames, Id love to. But this is not the right context. This videos purpose is to demonstrate inertia in inertial reference frames. You know, the ones where Newtons Laws apply. Yeah, those. Certainly youll agree that inertia is of the greatest conceptual importance. As a teacher, I have found that most people I meet do not have a conceptual understanding of inertia though they are able to recite Newtons First Law in a droning voice when asked. Words with no meaning. Blech.
BTW — Those who like accelerated reference frames and their challenges may enjoy this video about impending motion of rigid solids: www.youtube.com/watch?v=JLHVf3eJKak
I made it. Maybe you like watching physics videos in your spare time.
And I will SORTA agree with you if you claim that theres a centrifugal force on the wood ring (as a 3rd-law counterpart to the centripetal force on the ball). I like Newtons 3rd as much as the next guy, but youre creating a REALLY shady definition. If we had no friction, the ring wouldnt even be moving. How you gonna define «center fleeing» for something that is not only not going in a circle...its not moving at all??!@?#$%?^$#?%$# But thats just a technical complaint. Really, I am just trying to convince early physics students that the BALL feels no outward force. Cuz trust me, THEY THINK IT DOES. Ask your mom — she may even think the ball feels an outward force. My people often predict that the balls path will curve OUTWARD from the circle. Thats what Im really trying to cure here. Love you, though! Keep warm this winter!