What is The Crisis in Cosmology?

In this thought-provoking video, we delve into the current state of cosmology and the crisis it faces today. From the study of the Universe's origin, structure, and evolution, cosmology has been at the forefront of our understanding of the world around us. However, recent discoveries and developments have brought about a crisis in this field, leaving scientists scrambling to find answers.

Join us as we hear from some of the greatest minds in cosmology, including Neil deGrasse Tyson, Brian Cox, and Alex Filippenko, as they discuss the current state of the field and the challenges it faces. These renowned scientists bring their unique perspectives on the ongoing debate regarding the nature of the universe, the role of dark matter and energy, and the mysteries surrounding the Big Bang.

We explore the latest scientific findings, including recent evidence that challenges our understanding of the universe's expansion and the accelerating rate of that expansion. We also delve into the controversies surrounding the cosmic microwave background radiation.

This video provides an insightful and in-depth look into the current state of cosmology, its challenges, and its prospects for the future. Whether you are a scientist, a student, or simply someone interested in the workings of the universe, this video is sure to leave you with a newfound appreciation for the complexities and mysteries of our cosmos. So prepare to be amazed by the incredible minds of Neil deGrasse Tyson, Brian Cox, Alex Filippenko, and the fascinating world of cosmology.

[meldroc]

I love cosmological crises! It means we're learning something!

[timhallas]

I think when all is said and done, where it all began is not as important as where it's all going. Do we have 10 billion years left, or just 4? I need to know. I do have plans.

[philh]

I despair. This is not a crisis. Science is mainly about disproving stuff to arrive at a better understanding. A scientist proved wrong is a happy scientist, they’ve learned something and improved their understanding. As we are able to see further back in time, see in more detail, our understanding continues to develop and theories are evolved or are discarded. This is the way.

[howfarawayisit]

My understanding was that the rate of expansion depends on the content of the Universe. And that the content shifted from energy to matter over time changing the Hubble Constant value. In other words, the 'constant' is actually a 'parameter' the Hubble Parameter. So why is this video calling for a crisis between two constant values for it when we have already determined that it is changing via the Lambda Cold Dark Matter big bang theory.

[leonardselenide]

Thanks for your comments DPh. Filippenko. Happy to hear your voice again.

[colendecipulo]

For clarification for everyone, the cosmological crisis is about the crisis of determining the age of the universe from different sources of data. It has nothing to do with your creationism perspective. It just means that either the calculation has an error or the model/theory that is used has a problem. Both problems can lead to better science. But I thought this problem was already solved last year.

[steve]

Suddenly not knowing something is a crisis. That's absurd considering it appears that what is unknown far exceeds what is known.

[mycount]

Why take a camp just say "More accurate measurements will resolve it." What is wrong with saying we are not sure or we don't know exactly?

[leeoldershaw]

If you stand back from this problem, using Occam's Razor, it is clear there is no dark matter or energy.

[GH-oijf]

I’m an old-timer and I don’t think it’s a crisis. If two independent methods give inconsistent answers, then somebody’s model needs work or some observations aren’t as good as you think. That seems to me to be normal in science. In the meantime, while the scientists are trying to resolve the inconsistency, the universe is unlikely to do anything that brings harm to life on Earth. So no, it is not a crisis.

[weylguy]

The CMB is what it is and will not change -- it's fixed, and subject only to interpretation. The cosmic distance ladder, however, appears to have a cumulative error built into it. Are Cepheid variables and Type 1a supernovae perfectly reliable in the sense that variations in their age, metalicity, size and physical relationships with nearby structures can be ignored? For example, look at the significant spread in the Type 1a supernova data (which incidentally appears to indicate an acceleration in the expansion rate of the universe). Now compare this with the CMB power spectrum, which is almost perfectly uniform. The supernovae data spread may tighten with future observations, but the CMB data will not. For this reason, I think the CMB is a more reliable indicator of the Hubble parameter.

[Celis.C]

If an object is 10 million light years away, light will take 10 million years to reach us.
Does still this apply if the space between the object and observer is expanding?

[Pilotprophet]

Interesting observation about this video. About 3% of the imagery has anything to do with the subject matter being discussed at any given moment. It's all just stuff thrown together. So go ahead and just listen to the audio. Makes it less confusing.

[orchiddo]

Cosmology is a science whose members imagine everything to explain the world around and stimulated many revolutions.

[MichaelQShaw]

At 3:46 that’s exactly what I believe a black hole would look like. No color, like a mirror. Even heat can cause the refraction of light. What does a mirage look like? It is a wavy blurry reflection rippling because of the heat rising up through the atmosphere. There is no atmosphere in the vacuum of space, so even though light cannot escape the event horizon, it would be a mirror like sphere reflecting the space around it if you could get close enough to see it.

[josephdonais]

Then there are the real scientists who can say, "I don't know, lets find out".

[oleggoldberg]

I think our concept of time, whilst useful for measuring phenomena and experience is useful to us for compartmentalizing reality, it simply doesn't exist outside of our perception.

[keithbell]

I don't see this as a "crisis".
But rather another opportunity to learn more in our understanding of the universe.
I have little tolerance for anyone who proclaims they have this all figured out.
So go ahead and erase the chalk board and start a new approach based on what the ever growing evidence reveals. That is what makes science exciting.
New discoveries.

[jacobwaldrop]

Wait, so dark energy is not a constant? How does that work with the concept of the conservation of energy?

[andrewvelonis]

I hope I can find this video again, it is so pithy it's hard to comprehend the details all in one go. I'm also interested in finding out more about early dog energy.