You're entitled to say, if you're so smart, why don't you tell me what that dark matter is? And I'll have to confess I don't know.
If the rate of expansion one second after the Big Bang had been smaller by even one part in a hundred thousand million million, it would have recollapsed before it reached its present size. On the other hand, if it had been greater by a part in a million, the universe would have expanded too rapidly for stars and planets to form.
Dark energy is incredibly strange, but actually it makes sense to me that it went unnoticed, because dark energy has no effect on daily life, or even inside our solar system.
I am deeply impressed with the way dark matter has explained cosmological observations.
In the far, far future, essentially all matter will have returned to energy. But because of the enormous expansion of space, this energy will be spread so thinly that it will hardly ever convert back to even the lightest particles of matter. Instead, a faint mist of light will fall for eternity through an ever colder and quieter cosmos.
It's part of the shape of the Universe. I only have to talk to somebody and they begin to hate me.
Astronomy is ... the only progressive Science which the ancient world produced.
I think it's amazing that the entire community of astronomy has done what it's done. We've been able to deduce the nature of time and space and where we all came from. It's the most amazing detective story in history.
In general, the objects in the universe that are very high-energy objects, or the processes that are high-energy processes, will radiate more in the short wavelength range towards the gamma rays or the x-rays.
One of the most exciting things about dark energy is that it seems to live at the very nexus of two of our most successful theories of physics: quantum mechanics, which explains the physics of the small, and Einstein's Theory of General Relativity, which explains the physics of the large, including gravity.
Most of what Einstein said and did has no direct impact on what anybody reads in the Bible. Special relativity, his work in quantum mechanics, nobody even knows or cares. Where Einstein really affects the Bible is the fact that general relativity is the organizing principle for the Big Bang.
Universe consists of frozen light.
Earlier theories ... were based on the hypothesis that all the matter in the universe was created in one big bang at a particular time in the remote past. [Coining the "big bang" expression.]
The big bang, the most cataclysmic event we can imagine, on closer inspection appears finely orchestrated.
I have a much easier time imagining how we would understand the big bang, even though we can't do it yet, than I can imagine understanding consciousness.
Astronomy is not the apex of science or of invention. But it is a test of the cast of temperament and mind that underlies a culture.
They say the Universe started with a big bang. I hope everybody stood well back.
First of all, the Big Bang wasn't very big. Second of all, there was no bang. Third, Big Bang Theory doesn't tell you what banged, when it banged, how it banged. It just said it did bang. So the Big Bang theory in some sense is a total misnomer.
The History Of The Universe In Three Words CHAPTER ONE Bang! CHAPTER TWO sssss CHAPTER THREE crunch. THE END
It is an embarrassment that the dominant forms of matter in the universe remain hypothetical.
Scientists estimate the universe unfolded from its state of infinite destiny* - a moment commonly referred to as "the big bang" - approximately 1.3-2 x 10^10 years ago. *Typo: "destiny" should read "density.
I can feel the universe expanding and making things be further apart.
It seemed like my favourite kind of job - a wonderful chance to ask something absolutely fundamental: the fate of the Universe and whether the Universe was infinite or not.
The 'hard swallow' built into science is this business about the Big Bang. ... This is the notion that the universe, for no reason, sprang from nothing in a single instant. ... Notice that this is the limit test for credulity. . . . It's the limit case for likelihood.
The idea of combining the physics of modern particle theory with cosmology was very young when I started working on cosmology.
