#generalrelativity

[wonders-of-the-cosmos]

Einstein's Zurich Notebook containing his private calculations related to his search for general relativity trying to incorporate gravity into his works of 1905. The notebooks were written between summer of 1912 to early 1913 and were found after his death in 1955. [Source: Einstein's Archive]Prof. John Norton of the Department of History and Philosophy of Science at University of Pittsburgh has tried to decode and explain all the equations and scribbles on the notebooks. source

[daviddavi09]

Time Dilation Explained: Relativity, Twin Paradox & Gravity

Explore the mind-bending world of time dilation and see how relativity changes the way we experience time. From Einstein's special and general relativity to the famous twin paradox, this video breaks down the science behind why moving fast or sitting in strong gravity can make your clock tick slower. Learn how near-lightspeed space travel could let you return younger than your friends, why GPS satellites must have relativity corrections, and how muon, atomic clock, and particle accelerator experiments prove these effects are real. Learn about gravitational time dilation near massive objects, including black holes, and the surprising implications for aging, society, and future interstellar travel.

[picnotesknowledge]

New “Chameleon Theory” could explain dark energy and how galaxies formed: http://bit.ly/ChameleonTheory

[spacedreamermx-blog]

Geodesic Sphere Not Enough Information.

[mobyweed]

<<Matter tells spacetime how to curve and spacetime tells matter how to move.>> John Archibald Wheeler. . Basics of general relativity. I love this quote, it makes me think of how small we are compared with the universe and its laws. We are so tiny and our time in this universe is so short we are just missing some perspective. . #penmanship #penman #cursive #cursiva #fountainpen #pen #matter #space #time #spacetime #einstein #wheeler #generalrelativity #relativity #greenink #franklin #franklinchristoph #curve #move #quote #quoteoftheday

[tresasnotebook-blog]

✍🏼 study with me ✍🏼Note taking is so much more fun when you have more markers and pens than you really need!

[atouchofstarlightblog]

Cats are a lot happier with you when you're studying general relativity than when you're doing quantum mechanics... #catsofinstagram #kittensofinstagram #studyspo #studygram #studyinspo #physics #astrophysics #studyblr #studying #stabilo #generalrelativity #wearestemsquad #STEM #science #scientist #studymotivation #studyinspiration #pastels #handlettering (at Cape Town, Western Cape)

[mildyopinionated]

The Image is not the Evidence

The other day I came across the claim that "space is fake" because NASA uses CGI.

Facebook Reel for Context:

https://www.facebook.com/share/v/1DJzPKKwQf/

The more I thought about it, the more I realized the argument isn't really about astronomy. It's about how people think.

I posed a simple, tongue-in-cheek question.

As much as I appreciate the skepticism, lemme pose a simple A and B Question: Would you rather have:

Option A:

Or...

Option B:

Obviously the option A is Einstein's field equation and the bottom one is obviously a black hole. Now the reason that I chose to use this is an example it's because the the field equation essentially in its most basic sense describes how light bends in SpaceTime whereas the black hole image demonstrates this gravitational lensing.

So when explaining super complex almost abstract Concepts almost everyone would pick the image because it's simply easier to understand rather than the mathematical equation, which technically is more accurate.

The reason that people would pick the image over the mathematical equation is not because the image is better evidence, but because human beings are visual creatures. We understand pictures far more easily than tensor calculus and differential geometry.

That's the entire point.

The image isn't replacing the mathematics. It's translating it.

Most of what astronomers study isn't even visible to the human eye. We can't see radio waves. We can't see X-rays. We can't see gamma rays or infrared light. Our eyes simply weren't built to perceive them.

So what do scientists do?

They build instruments that can detect those wavelengths. They collect enormous amounts of data. They compare those observations against mathematical models that make testable predictions. Then they translate all of that information into something the rest of us can actually comprehend.

That's where CGI comes in.

Not as evidence.

As communication.

A black hole visualization isn't claiming, "This is exactly what your eyes would see if you floated next to one."

It's saying, "Based on the mathematics and the observational data, this is what these phenomena would look like."

Could someone fake a CGI image?

Of course.

Just like someone could fake a graph, fake a spreadsheet, fake a weather radar image, or fake an MRI scan.

That tells you absolutely nothing about whether the underlying data are legitimate.

The evidence isn't the picture.

The evidence is the mathematics, the observations, the spectroscopy, the telescope arrays, the reproducible measurements, and the countless independent attempts to test whether those predictions actually match reality.

That's why science is so powerful.

It isn't based on authority.

It isn't based on believing NASA.

It's based on reproducibility.

If someone has the expertise, the equipment, and the time, they can analyze the same data, derive the same equations, and see whether the predictions hold up.

The scientific method isn't designed to prove ideas right. It's designed to prove them wrong. Theories survive because people spend decades trying to break them, and the ones that continue making accurate predictions become the best explanations we have.

At the end of the day, I don't trust a black hole visualization because it looks convincing. I trust that it represents a model that has survived decades of scrutiny, testing, refinement, and independent verification.

So no, the CGI isn't the evidence.

It's the translation.

The equations are the language.

And unless you plan on learning differential geometry and tensor calculus, chances are you'd rather look at the picture too.