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?

How do you investigate hypotheses?

Math

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

Alien

All life on Earth started as single-cell bacteria and stayed like that for two billion years. So even if we do find alien life out there, what are the chances of that life being complex like us? Astronaut host – Mae Jemison.

8/10One Strange Rock • 2018 • Astronomy

Death Dive to Saturn

Almost everything we know today about the beautiful giant ringed planet comes from Cassini, the NASA mission that launched in 1997 and arrived at Saturn in 2004. Since then, the space probe has been beaming home miraculous images and scientific data, revealing countless wonders about the planet, its rings and 62 moons - including some that could harbor life. As the mission approaches its final days in 2017, it attempts one last set of daring maneuvers - diving between the innermost ring and the top of Saturn's atmosphere. Aiming to skim less than 2000 miles above the cloud tops, no spacecraft has ever gone so close to Saturn, and hopes are high for incredible observations that could solve major mysteries about the planet's core. But such a daring maneuver comes with many risks and is no slam dunk. In fact, slamming into rocks in the rings is a real possibility. Join NASA engineers for the tense and triumphant moments as they find out if their bold re-programming has worked, and discover the wonders that Cassini has revealed over the years.

NOVA PBS • 2017 • Astronomy

The Explorers

A look at the continuing evolution of the cosmos. What our existence tells us about the universe and how complicated it is. Why are things the way that they are? The spacecraft Artemis initiates launch sequence and begins its 4.7 light year journey to Minerva B - an Earth-like exoplanet.

S1E2Living Universe • 2018 • Astronomy

To the Moon

To land a human being on another celestial body will be the first step to living beyond our planet. The breathless pace and daring of the Apollo program sees NASA master previously unimagined tasks in the attempt to achieve the most incredible accomplishment in the history of human endeavor. From the ashes of tragedy on Apollo 1 emerges a determination that puts Apollo 8 in orbit around the Moon ahead of schedule. Apollo 9 and 10 each break bold new ground and pave the way for something few dared to believe was possible. When Neil Armstrong and Buzz Aldrin walk on the Moon and return safely to earth, the whole planet throws them a party.

S1E2The Space Age: NASA's Story • 2009 • Astronomy

The Moon: Earth's Guardian Angel

Astronaut Mike Massimino reveals the mysterious secrets of the moon, a world permanently tied to Earth; using new research, he uncovers the mysterious origin of the moon and how it kick-started life on Earth.

S1E8The Planets (US) • 2017 • Astronomy

Jupiter's Alien Secrets

Experts aim to uncover what is hidden beneath Jupiter's violent storms. The story of how humans built machines that not only survived the perils of Jupiter, a massive and dangerous planet surrounded by a wreath of deadly radiation, but revealed its innermost secrets.

S1E2Mysteries of our Universe: Our Solar System • 2019 • Astronomy