Misconceptions About the Universe • 2014 • Veritasium

Category: Astronomy | Download:

The expanding universe is a complicated place. During inflation the universe expanded faster than light, but that's something that actually happens all the time, it's happening right now. This doesn't violate Einstein's theory of relativity since nothing is moving through space faster than light, it's just that space itself is expanding such that far away objects are receding rapidly from each other. Common sense would dictate that objects moving away from us faster than light should be invisible, but they aren't. This is because light can travel from regions of space which are superluminal relative to us into regions that are subluminal. So our observable universe is bigger than our Hubble sphere - it's limited by the particle horizon, the distance light could travel to us since the beginning of time as we know it.

Make a donation

Buy a brother a hot coffee? Or a cold beer?

Hope you're finding these documentaries fascinating and eye-opening. It's just me, working hard behind the scenes to bring you this enriching content.

Running and maintaining a website like this takes time and resources. That's why I'm reaching out to you. If you appreciate what I do and would like to support my efforts, would you consider "buying me a coffee"?

Donation addresses

buymeacoffee.com

patreon.com

BTC: bc1q8ldskxh4x9qnddhcrgcun8rtvddeldm2a07r2v

ETH: 0x5CCAAA1afc5c5D814129d99277dDb5A979672116

With your donation through, you can show your appreciation and help me keep this project going. Every contribution, no matter how small, makes a significant impact. It goes directly towards covering server costs.

Veritasium • 2014 • 2 episodes •

Can You Solve This?
4:43
Can You Solve This?

How do you investigate hypotheses?

Math

Misconceptions About the Universe
5:45
Misconceptions About the Universe

The expanding universe is a complicated place. During inflation the universe expanded faster than light, but that's something that actually happens all the time, it's happening right now. This doesn't violate Einstein's theory of relativity since nothing is moving through space faster than light, it's just that space itself is expanding such that far away objects are receding rapidly from each other. Common sense would dictate that objects moving away from us faster than light should be invisible, but they aren't. This is because light can travel from regions of space which are superluminal relative to us into regions that are subluminal. So our observable universe is bigger than our Hubble sphere - it's limited by the particle horizon, the distance light could travel to us since the beginning of time as we know it.

2014 • Astronomy

You might also like

Aliens: The Big Think
58:55
Aliens: The Big Think

The hunt for aliens is on! After a distinguished career in cosmology Professor Martin Rees, the astronomer royal, has taken up the search for extra-terrestrials. Looking for aliens is no longer science fiction - it is a question that's engaging some of the greatest minds in science. As our knowledge of the universe has increased, we're getting closer to answers. Many scientists now think we live in galaxy with a billion Earth-like planets, many of which may be teeming with life. But what kind of life? Has anything evolved into beings we could communicate with? This film gets inside the minds of the scientists considering one of the most exciting and profound questions we can ask - are we alone in the universe? Professor Rees thinks we may have our idea of what an alien is like all wrong. If he's right, it's not organic extra-terrestrials we should look for, it's machines.

2016 • Astronomy

Extraterrestrial Life
18:53
Extraterrestrial Life

Explained examines the possibility of extraterrestrial life and looks at why we have not yet found evidence for its existence despite efforts to look for it. It considers the Fermi paradox which suggests that given the vastness of the universe that there should be a great deal of extraterrestrial life in our galaxy. It also consider conspiracy theories about U.F.O.

S1E9 • Explained • 2018 • Astronomy

How the Universe Built Your Car
43:01
How the Universe Built Your Car

Beneath the hood of your car lies the history of the Universe. The iron in your chassis, the gold in your stereo and the copper in your electronics all owe their existence to violent cosmic events that took place billions of years ago.

S4E1 • How the Universe Works • 2015 • Astronomy

Saturn: The Moon King
11:18
Saturn: The Moon King

The latest developments in space technology continue to reveal the wonders of our solar system. With new moons recently spotted orbiting Saturn, the gas giant has taken the lead in our The Gas Giant has taken the lead in our cosmic neighbourhoods Moon Count

S4E7 • Breakthrough • 2021 • Astronomy

Part 2
43:54
Part 2

After the destruction of Shuttle Challenger, the US considered grounding its fleet for good. That is until the stunning discovery that the Soviets had built their own fleet using plans stolen from NASA.

S1E2 • Secrets of the Space Shuttle • 2018 • Astronomy

Dead or Alive
58:48
Dead or Alive

The worlds that surround our planet are all made of rock, but there the similarity ends. Some have a beating geological heart, others are frozen in time. Professor Brian Cox travels to the tallest mountain on Earth, the volcano Mauna Kea on Hawaii, to show how something as basic as a planet's size can make the difference between life and death.

S1E4 • Wonders of the Solar System • Astronomy