Introducing absolutely everything the beginning of history starts here there are 50 billion galaxies in the universe 95% is still uncharted this series examines the mysteries of everything, from black holes to how our sun functions. The universe is about 138 billion years old, so any light we see has to have been travelling for 138 billion years or less – we call this the 'observable universe' however, the distance to the edge of the observable universe is about 46 billion light years because the universe is expanding all of the time. The universe is the whole of all matter, energy, planets, galaxies and space an example of universe is where everyone and everything exists. The origin of the universe this lecture is the intellectual property of professor swhawking you may not reproduce, edit, translate, distribute, publish or host this. The ultimate fate of the universe is a topic in physical cosmology, whose theoretical restrictions allow possible scenarios for the evolution and ultimate fate of the universe to be described and evaluated.
For a long time, astronomers thought that almost all of the universe was made of regular matter (called baryonic matter it is the same kind of matter that makes up everything on earth and all the stars (protons, neutrons and electrons). Kids learn about the universe in the science of astronomy including expansion, size, dark matter and energy, age, and fun facts. I am very confused about things my science book says about the expanding universe every book i have seen has defined the universe as everything. Scientists have redrawn the cosmic map of our corner of the universe, using new tools to define which galaxies interact with our own the so-called supercluster of galaxies that contains the milky way has been named laniakea, which means immense heaven in hawaiian defining regions in an. The universe it's the only home we've ever known thanks to its intrinsic physical laws, the known constants of nature, and the heavy-metal-spewing fireballs known as supernovae we are little tiny beings held fast to a spinning ball of rock in a distant corner of space and time.
The scale of the universe shows everything from the smallest to largest things in our universe check out the scale of the universe right now amazing to see. The age of the universe is a little bit higher than we expected a few years ago, the wmap spacecraft looked at the universe much as planck has, and for the time got the best determination of the cosmic age: 1373 +/- 012 billion years old.
Physicists have long studied the nature of the universe but some go a step further into the unknown (and probably unknowable), contemplating what lies outside the boundaries of our universe. What is the universe contained in what does the universe expand into is the universe a subset of another entity what was there before the universe, and where did the big bang occur. In the early 1990s, one thing was fairly certain about the expansion of the universe it might have enough energy density to stop its expansion and recollapse, it might have so little energy density that it would never stop expanding, but gravity was certain to slow the expansion as time went on.
One of the most spectacular discoveries of the 20th century was that the universe itself was expanding when einstein put forth his general theory of relativity, he swiftly recognized that there was a consequence he was unhappy about: a universe that was filled with matter in all directions would be. Space, as douglas adams once so aptly wrote, is big to try imagining how big, place a penny down in front of you if our sun were the size of that penny, the nearest star, alpha centauri, would be 350 miles away.
The universe is a computer simulation just like the plot of the matrix, you may be living in a highly advanced computer program and not even know it some version of this. By popular space fan request, i offer this video to help answer some of your questions regarding the expanding universe many of you consistently ask: if the.
A better analogy is the surface of an expanding balloon not the 3 dimensional balloon, just its 2 dimensional surface if you were an ant crawling around the surface of a huge balloon, and the balloon was your whole universe, you would see the balloon as essentially flat under your feet. Watch video the universe was born with the big bang as an unimaginably hot, dense point when the universe was just 10-34 of a second or so old — that is, a hundredth of a billionth of a trillionth of a trillionth of a second in age — it experienced an incredible burst of expansion known as inflation, in which space itself expanded faster than the speed. If the universe has the critical density then there are about 1000 solar masses for every solar luminosity, so an even greater fraction of the universe is dark matter. Watch the what is the volume of the known universe video clip of history's series the universe' find this and many more videos only on history. The more we learn about the universe, the more we discover just how diverse all its planets, stars, nebulae and unexplained chunks of matter really are so what is all this matter doing in our universe, other than just floating in space. How big is the universe could it be infinitely large if the universe has an edge, what is beyond the edge and if the universe had a beginning, what was going on before that in this article, cosmologist brent tully tackles such big questions and describes recent research that has altered our. Vocabulary concerning the universe outside of our solar system learn with flashcards, games, and more — for free.