Wednesday, March 17, 2021


Gravity, specifically gravitational waves, is in many people’s minds right now. We all experience the force of gravity. It happens when you jump in the air, although, despite what many with aspirations to Superman would like, we tend to fall back to the ground.

But what if we could make the force of gravity stop? Physicists are convinced it could never happen, but that hasn’t stopped some people from exploring this idea. Changes in the body. 

We analyzed how the absence of gravity affects the human body, in a brief lecture at Ted-Ed, the organization specializing in inspirational lectures and talks.

STart say that our bodies are adapted to a gravitational Earth atmosphere.

Everything that goes up has to go down. If we lived for a while in a place where gravity is different, like a spaceship, our organism would change. It is now a proven fact that astronauts lose bone mass and muscle strength during their stays in space, and their sense of balance changes.

"And the absence of gravity brings other problems," Kein Fong wrote in Wired.

Why it is so important that Albert Einstein’s prediction of gravitational waves has been proven. For some reasons that are still unclear, the number of red blood cells decreases in the form of "spatial anemia".

Wounds take longer to heal and the immune system loses its strength. Even sleep is affected by the reduction or lack of severity.

That’s what happens after a brief visit to space. "What would happen if we grew up without gravity?" Buckley asks. "What about gravity-dependent systems like your muscles, your balance system, your heart, or your blood vessels?"

There are good reasons to believe that the human body would develop differently.

Buckey recalls an experiment in which a cat grew up with a permanently hidden eye, covered with a patch. As a result, the cat went blind.

Living without gravity affects our body. The circuit system that connects the vision processing regions of the brain was not developed because the eye was not processing any visual information: a very literal example of the old phrase "use it or lose it". It seems likely that the rest of our body would respond similarly. If gravity were not there for our hearts, muscles, and bones, our organs would develop very differently.

And on Earth too.

And if gravity were to disappear one day, we would have other more urgent things to worry about, besides the long-term effects on human development.

Karen Masters, an astronomer at the University of Portsmouth in the United Kingdom, explored the immediate physical consequences of lack of gravity.

The first problem is that the Earth would rotate at high speed, just like a weight hanging from a chain if you rotate it around your head.

"Disconnecting gravity would mean letting go of the chain," says Masters. "Things wouldn’t stick to Earth in any other way and fly in straight line in space, away from the Earth’s surface," he says.

"Anyone who was unlucky enough to be out of it at any given time would be quickly lost".

"People inside the houses would be safer because most of the buildings are firmly fixed to the Earth and would remain so even if there was no gravity, at least for a while," says Masters.

Anything else that wasn’t fixed on Earth would float.

The Earth’s atmosphere and its oceans, rivers and lakes would be one of the first things to disappear into space.

"Oh, and of course, we would all die," wrote Jolene Creighton for the digital magazine Futurism.

In pieces. "The lack of gravity, in the end, would make a dent in our planet," wrote Masters in Ask an Astronomer (ask an astronomer), a digital project at Cornell University, USA.

"The Earth itself would probably break into pieces and float in space," he added.

Being inside the house would serve as a protective measure... at least temporarily.

A similar fate would await the Sun, explains a video from DNews. Without the force of gravity to hold it together, the intense pressures would burst its core, causing a titanic explosion.

The same would happen with other stars in the Universe.

However, since these are so far away, it would be years before the flash of his death reached us.

Finally, there would be no accumulation of matter, such as stars or planets, anywhere in the Universe. There would only be a diffuse soup of atoms and molecules, floating adrift.

This scenario, which, as we said before, could never happen, illustrates how crucial the force of gravity is in the functioning of the Universe. Without it, our planet and this website you’re reading, they wouldn’t exist.

Gravity is one of the four fundamental forces that govern our Universe. The other three forces are equally important; without electromagnetism and nuclear forces, the atoms themselves would disappear. But gravity is what most people know. Maybe that’s why we’re so fascinated with ideas like antigravity.


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