What is Gravity? | Wondrium Perspectives

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What goes up must come down, right? We’ve heard that old saying many times throughout our lives. But as it turns out, gravity isn’t quite so simple.

In this episode of Perspectives, four experts discuss what we know about gravity as well as some of the things we’re still trying to figure out.
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Clips in this video are from the following series on Wondrium:

Understanding the Misconceptions of Science, presented by Don Lincoln

The Higgs Boson and Beyond, presented by Sean Carroll

What Einstein Got Wrong, presented by Dan Hooper

Great Heroes and Discoveries of Astronomy, presented by Emily Levesque

The Evidence for Modern Physics: How We Know What We Know, presented by Don Lincoln

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Table of Contents

00:00 Gravity before Newton
03:57 Newton’s Universal Law of Gravitation
07:49 Einstein’s General Theory of Relativity
12:44 Proof of Gravitational Waves
16:08 What Is Quantum Gravity?

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Wondrium Perspectives is hosted by Rich Bernett.
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Welcome to Wondrium on YouTube.

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[Three hashtags that apply to the video topic]

[ozgott]

I understood the data on gravitational waves better than I understood the multiple unnecessary camera angles and shifts in this video.

[googoogjoobgoogoogjoob]

Continually changing the perspective of the camera is just weird.

[juasmith]

In 2016 they proved what Bob Lazar has been saying since 1989, that gravity is a wave.

[DirtyMikeACTUAL]

Every one is asking “what is gravity?” But no one is asking “HOW is gravity?”

[nicholasmccarthy]

Thank you. Really well put together presentation. Much appreciated.

[robertxx]

This gravity thing is really cool. Sitting on my sofa watching this I was able to leap around the studio so he had to keep turning to look at me. Quantum!

[mrgoat]

Brilliant minds that can't figure out which camera to look at lol

[SirFency]

if a gravitational wave is so difficult to detect on a planet the size of the earth its no wonder that we cannot see the effects on the molecular level.

[Yeti_Boop]

This video is fascinating. How do you get so many different camera angles packed into one video? The scientist talks for about 7 seconds, turns, looks at a new camera, talks for 7 seconds, turns, looks at yet another camera, talks.. and so on over and over and over lol

[MrAdal]

Nobody knows exactly what gravity is. We can only observe it’s effects.

[JanPBtest]

8:27 Strictly speaking Einstein says that the energy-momentum and spacetime curvature are _correlated_ in a certain strict way, it does not say that one _causes_ the other.

[Motor]

Interestingly I understood everything they said of what gravity does but they still didn't explain what gravity is. 🤔 So I'm going to stick with my childish explanation which is, there's an ocean of energy in the universe you can call it the ether or dark energy. Doesn't matter, it's the same thing. What this energy does is basically feed all the particles of the universe. All the atoms are basically sucking energy from the universe. This energy is like a waterfall which creates a denser waterfall as it gets closer to the object it's feeding, thus giving you a slope that increases in density. I guess they would call that bending time and space. Anyways... till somebody explains better I'm sticking with my version. But it will say it was a good video, 👍 just needs a little bit more info. So What is Gravity? Gravity is the state of compression of energy as it's moving to whatever object. In other words, it's the ether or dark energy or whatever you want to call it. 😊

[saadabbas]

Post-Newtonian Gravitational and Scalar Waves in Scalar-Gauss-Bonnet Gravity

By
Banafsheh Shiralilou, Tanja Hinderer, Samaya Nissanke, Néstor Ortiz, Helvi Witek

[goergelucas]

The only true words that where said, WE DON'T KNOW HOW IT ALL WORKS, . WHAT IS A WAVE OR A FLIED ????

[mikewalker]

I visualize gravity as the expansion of space-time. The universe expands into time slower around an object that has mass.

[taz]

GRAVITY EXPLAINED


The universe is made of minute cells once contained in a universal
shell that was broken or rotated by an external force.
this produced expansion creating a true void that must not exist,
leaving the cells to expand or split, I believe the destruction or
splitting of cells is where all matter originates,
therefore matter must be the end state of all our universe
until the universal matter will disperse or be contained
by an outer external force or medium.
The cells must penetrate matter to a degree becoming harder the denser the matter until it is so dense it is impossible thus the push back is multiplied infinitely
causing corresponding gravity push.
As far as so-called gravity it is plain to see that there is no attraction only an external push
forcing matter together .
Imagine an oil filled rubber ball each molecule of oil must have the same force upon it.
Then introduce a foreign particle of the same size and density then each molecule will have slightly
higher pressure upon it nothing will coalesce
then add a larger or denser body with larger or harder surface to be pushed upon by the other molecules
all the molecules will feel a small amount more push but the nearer the large body cells will get pushed harder.
[this energy really comes from the constant push from the ball membrane or that exists outside it]
then introduce a smaller dense body in the vicinity of the harder pushed cells.
if the number of hard pushed cells behind this body is higher than the ones between it and the large body then gravity is achieved.
Without resistance to these cells energy would not be forced to navigate a wave pattern,
the cells would not become excited and light as we know it would not exist .
Energy waves passing through harder pushed cell formations will deviate around
the reason they are pushed.
Hard pushed cells may be deformed from a sphere into an ovoid making it harder to rotate,
also making energy travel differently
The universe itself may be such an ovoid thus the reason for expansion.
Magnets must rearrange the cells making the rearranging object harder or easier to navigate between depending the manufactured configuration.
As far as Quantum physics goes we do not have any real data so mathematical
physics is applied and comes up with sometimes fanciful answers to fit a paradox.
Understanding a data lacking subject has always failed people already in this
field would do best just striving for accurate observation as some early astronomers did.
An understanding will develop with detection instruments and supercomputing enhancements,
seeing it first hand. some bright spark will discover the bleeding obvious and mathematise it.
We must determine the size and density of each cell by measuring each light wave
in relation to one another, and the number of cells between each crest
and finding the correlation that would fit all known energy waves if this can be achieved, the next
step must be to create
corresponding energy waves before a moving object creating an air in sand effect thus help said object closer to the preceding wave speed
Initial measurements should be simple two dimensional with known wave patterns overlaid on the same plane and begin with spherical solid cells filling the voids between the crests of all waves.
First, hoping all the energy waves respect the integrity of each cell, if not some types of energy waves
may penetrate part of the cell, as do they penetrate some matter.
black holes are remnant void bubbles still trying to eliminate the space where cells are absent, destroying surrounding cells and creating matter and drawing existing
matter to fill the void .billions may have succeeded leaving small super dense spheres but most can't keep up with the constant universe expansion and will take all
their surrounding galaxy and more.
No matter how beautiful and pleasant maths is, since the mid 60's, it has blinded physicists
before then a physical notion was envisaged then came out the ruler to see if it would stack up.
These are some answers to how things unfolded but surely the harder question is why.
Why has life evolved to a stage that we can pose these questions?
Surely non existence would be the easier option, without struggle without knowing about
your inevitable destruction personally and universally this question is the real puzzle.
This is why the emergence of conscience coincided with a genetic predisposition towards
a god culture everywhere on earth, a genetic valium so to speak.
which must be ameliorated not railed against by atheist dissenters, as it just a part of
our bodies .

The answer can only be chemistry, all life is simply a chemical reaction, the same as the
stars react with each other, no matter how complicated its components become it must rely
on the basic building blocks to exist, my thoughts while writing this are governed by
a chemical reaction and the lightning created by reaction.
Therefore if matter has no will and the meeting of different types of matter will react
differently then the meaning of life has the same weight as mixing paint, life and death is
eventually inevitable wherever matter coalesces .

[TheodoreRizzo]

Up until recently I’ve become fascinated nerd and learn about the universe and all these educational videos are gold to me.

[colinmaharaj]

I have a theory, but who will listen. I have limited math and physics background.

[nickcalmes]

It's so crazy how close LePlace was to actually explaining general relativity. Insane how close he was.

[frederickl]

Minor peeve, He said the sun is the center of the universe. That just not an accurate statement, the sun is the center of the solar system but is not the center of the universe. It would be more accurate to say you are the center of the universe, as you can only see the edge of your observable universe that extends the same distance in all directions. It is impossible to know where objective "center" is.