All posts tagged: cosmological

The “perfect cosmological principle” isn’t true for our Universe

The “perfect cosmological principle” isn’t true for our Universe

Published by Jenni Sidey

Back in 1923, an unprecedented scientific revolution occurred. Hubble’s discovery of a Cepheid variable in the Andromeda galaxy, M31, opened up the Universe to us, giving us the observational evidence we needed for galaxies beyond the Milky Way and leading us, in short order, to the discovery of the expanding Universe. Credits: NASA, ESA and the Hubble Heritage Team (STScI/AURA); Illustration via NASA, ESA, and Z. Levay (STScI) Distances to individual stars were measured beyond the Milky Way. Edwin Hubble’s original plot of galaxy distances, from 1929, versus redshift (left), establishing the expanding Universe, versus a more modern counterpart from approximately 70 years later (right). Many different classes of objects and measurements are used to determine the relationship between distance to an object and its apparent speed of recession that we infer from its light’s relative redshift with respect to us. As you can see, from the very nearby Universe (lower left) to distant locations over a billion light-years away (upper right), this very consistent redshift-distance relation continues to hold. Earlier versions of Hubble’s graph …

“God” As Cosmological Consciousness – TheHumanist.com

“God” As Cosmological Consciousness – TheHumanist.com

Published by Sam Flores

V’Yomer Elohim — and God(s) said… Genesis 1:3 I’ve explored what I’ve come to call “the hard problem of consciousness” (thank you, David Chalmers) since I was an undergraduate taking my first philosophy class under a remarkable professor, Dr. John Atwell. The question is simple to ask and maddening to answer: What exactly is consciousness, and where does it reside? Or, as someone hit hard on the head might put it: Who am I? Where am I? What am I? I can’t help but think that even the ancients — and possibly earlier peoples, of whom we have no record beyond burial rites suggesting religious belief — felt some presence “in back of” consciousness that sparked their attempts to explain a power they felt but couldn’t name. Out of that impulse came tens of thousands of religious belief systems. My purpose here is to persuade those open to persuasion that, whatever the source of their religious beliefs — family tradition, genuine conviction or something else — we can make far better use of our own …

Does dark energy really exist? Our work identifies cracks in the foundations of today’s cosmological model

Does dark energy really exist? Our work identifies cracks in the foundations of today’s cosmological model

Published by skeptic

According to our best understanding, the universe is expanding – and is doing so at an accelerating rate. This is believed to be caused by something called the “cosmological constant”, which was first proposed by Albert Einstein in his theory of general relativity. In recent decades, it has become better known as dark energy, which is believed to make up about 70% of the universe. Crucial to this realisation were studies of Type Ia supernovae – exploding white dwarf stars. These are thought to emit a specific amount of light, which allows astronomers to determine their distances very accurately and thereby track the expansion of the universe. This work was awarded the 2011 Nobel prize in physics. The accelerating expansion of the universe is thought to be due to negative pressure, an unusual property of dark energy that allows it to overcome the attractive force of gravity. Yet the exact nature of dark energy remains a puzzle. It cannot be explained by our best theory for the fundamental building blocks of the universe – known …

The quantum realm, the cosmological realm, and the multiverse, in 69 minutes

The quantum realm, the cosmological realm, and the multiverse, in 69 minutes

Published by Jenni Sidey

Astrophysicist Hakeem Oluseyi takes us from the quantum realm to the cosmological and out to the multiverse, answering physics’ underexplored questions.  He digs through the actual nature of electrons, why your speed through space is always borrowed from your speed through time,and why the Andromeda Galaxy is visible to the naked eye, yet almost no one has looked for it. This video The quantum realm, the cosmological realm, and the multiverse, in 69 minutes is featured on Big Think. Source link