Mind-blowing’ dark energy instrument results show Einstein was right about gravity — again. “Studying the rate at which galaxies formed lets us directly test our theories and, so far, we’re lining up with what general relativity predicts at cosmological scales

General relativity has passed one of its most precise tests ever thanks to observations of the past 11 billion years of cosmic evolution collected by the Dark Energy Spectroscopic Instrument, or DESI.

Albert Einstein’s 1915 theory, general relativity, has remained humanity’s best description of gravity for the past 100 years. Cosmologists have used general relativity to model how the cosmos has evolved — from its earliest moments to its current state — and shown how gravity brought together tiny clumps of matter to form vast galaxies as well as clusters of those galaxies. Yet, while general relativity has passed every test applied to it on relatively small scales, few tests have challenged it on very large scales. 

Scientists have now performed one such large-scale test by using DESI. They observed almost 6 million galaxies and quasars, which are bright hearts of galaxies powered by feeding supermassive black holes. Perhaps unsurprisingly, this test, which has traced the evolution of the universe since it was around 3 billion years old, has once again shown general relativity to be the right “recipe” for gravity

What did Albert Einstein say about gravity?

Albert Einstein’s theory of gravity explains gravity as the warping or curving of space and time. More massive bodies cause space-time to curve, leading to the movement of smaller objects towards them

Who proved Einstein’s theory of gravity?

Testing the theory

Subsequently, Arthur Stanley Eddington’s 1919 expedition confirmed Einstein’s prediction of the deflection of light by the Sun during the total solar eclipse of 29 May 1919, which helped to cement the status of general relativity as a viable theory.

Which scientist said that light is affected by gravity?

Relativity is two related theories: special relativity, which explains the relationship between space, time, mass, and energy; and general relativity, which describes how gravity fits into the mix. Albert Einstein proposed these theories starting in 1905. By the 1920s, they were widely accepted by physicists

Who is the real father of gravity?

Isaac Newton changed the way we understand the Universe. Revered in his own lifetime, he discovered the laws of gravity and motion and invented calculus. He helped to shape our rational world view. But Newton’s story is also one of a monstrous ego who believed that he alone was able to understand God’s creation

Details of cosmic structure and how it has changed over time are a potent test of how well we understand gravity because it was this force that shaped galaxies as they evolved out of the small variations in the distribution of matter in the early universe

From the tiniest fluctuations after the Big Bang, gravity has orchestrated the formation of galaxies, stars, and planets, creating the vast cosmic web we see today.

Gravity isn’t just what keeps us grounded — it’s been shaping the universe since its earliest days. Recent studies have provided the most precise tests of gravity on the grandest scales imaginable.

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