Universe Quotes (2152 quotes)
Our Universe Could Be An Expanding Bubble in an Extra Dimension
Structure of the Universe Does the Universe have an edge, beyond which there is nothing? Are the galaxies arranged on the surface of a sphere? Why can't we see the whole universe? Does the term "universe" refer to space, or to the matter in it, or to both? Evolution of the Universe Did the Universe expand from a point?
The Big Bang theory represents cosmologists ' best attempts to reconstruct the 14 billion year story of the universe based on the sliver of existence visible today. Different people use the term "Big Bang" in different ways. Most generally, it illustrates the arc of the observable universe as it thinned out and cooled down from an initially dense, hot state. This description boils down to the idea that the cosmos is expanding, a broad principle analogous to survival of the fittest in biology that few would consider debatable. More specifically, the Big Bang can also refer to the birth of the observable universe itself — the moment something changed, kickstarting the events that led to today.
It was the immediate aftermath of the big bang, and the universe was filled with a torrid plasma—an energetic soup of particles and radiation. The ringing happened everywhere, so intensely that we can still sense it In fact, the primordial reverberation is so well measured and modeled that it has been used to deduce the precise rate at which the universe is expanding, a number known as the Hubble constant. That constant, in turn, is the cornerstone of our modern understanding of the size, age and structure of the cosmos. But this seeming triumph has recently led Knox and his colleagues into controversy and confusion.
Though we live in the universe, there's still a heck of a lot we don't know about it. Even with that limited information, there are dozens of scientific theories about space and time to explain away the greatest mysteries of our intergalactic neighborhood. Not all of them are pleasant, though.
what was the medical revolution
2. Evolving universes
Murray Gell-Mann: Smolin?, By Stephen Battersby. Cosmology is one of the most creative and bizarre areas of science.
This discrepancy has been identified in scientific papers over the last several years, but it has been unclear whether differences in measurement techniques are to blame, or whether the difference could result from unlucky measurements. The universe is getting bigger every second. The space between galaxies is stretching, like dough rising in the oven. But how fast is the universe expanding? As Hubble and other telescopes seek to answer this question, they have run into an intriguing difference between what scientists predict and what they observe. But to Harvard string theorist Cumrun Vafa , there is a reason to doubt dark energy—that is, dark energy in its most popular form, called the Hubble cosmological constant.