The universe (observable or otherwise) has no boundary in the physical sense. ... The universe exists everywhere and and is approximately the same everywhere. The expansion means not that more universe is being created, but that the distance between things and other things, on average, increases.

Does the universe have an outer edge or?

The universe, being all there is, is infinitely big and has no edge, so there's no outside to even talk about. Oh, sure, there's an outside to our observable patch of the universe. The cosmos is only so old, and light only travels so fast. ... The current width of the observable universe is about 90 billion light-years.

Is the universe infinite?

The observable universe is finite in that it hasn't existed forever. It extends 46 billion light years in every direction from us. (While our universe is 13.8 billion years old, the observable universe reaches further since the universe is expanding).

Does the universe have a center?

According to all current observations, there is no center to the universe. For a center point to exist, that point would have to somehow be special with respect to the universe as a whole.

What lies at the edge of the universe?

The edge of the observable universe also marks what is called the particle horizon, the maximum distance one can see into the past. Everything we have seen so far was from the perspective of keeping Earth at the center and scaling time to the past with distance.

What Happens At The Edge Of The Universe? | Space Time | PBS Digital Studios

29 related questions found

Does space have an end?

Scientists now consider it unlikely the universe has an end – a region where the galaxies stop or where there would be a barrier of some kind marking the end of space.

Is there an unobservable universe?

The unobservable Universe, on the other hand, must be at least 23 trillion light years in diameter, and contain a volume of space that's over 15 million times as large as the volume we can observe.

Why doesnt the universe have a center?

There no centre of the universe because there is no edge of the universe. In a finite universe, space is curved so that if you could travel billions of light years in a straight line you would eventually finish back where you started. It is also possible that our universe is infinite.

How can we prove that the universe is expanding?

Astronomers observed that light from distant objects in the universe is redshifted (shift in the frequency of light towards red color), which tells us that the objects are all receding away from us.

Does the universe have a shape?

According to Einstein's theory of General Relativity, space itself can be curved by mass. As a result, the density of the universe — how much mass it has spread over its volume — determines its shape, as well as its future. ... This is known as an open universe. The shape of the universe depends on its density.

Is time Travelling possible?

In Summary: Yes, time travel is indeed a real thing. But it's not quite what you've probably seen in the movies. Under certain conditions, it is possible to experience time passing at a different rate than 1 second per second.

Is space hot or cold?

If atoms come to a complete stop, they are at absolute zero. Space is just above that, at an average temperature of 2.7 Kelvin (about minus 455 degrees Fahrenheit). But space is mostly full of, well, empty space. It can't move at all.

Why is space black?

Because space is a near-perfect vacuum — meaning it has exceedingly few particles — there's virtually nothing in the space between stars and planets to scatter light to our eyes. And with no light reaching the eyes, they see black.

Did Einstein believe in a static universe?

Until 1931, physicist Albert Einstein believed that the universe was static. ... In 1917 Einstein applied his theory of general relativity in the universe, and suggested a model of a homogenous, static, spatially curved universe.

Will the universe be reborn?

The universe could bounce through its own demise and emerge unscathed. A new “big bounce” model shows how the universe could shrink to a point and grow again, using just the cosmic ingredients we know about now.

How many universe are there?

The only meaningful answer to the question of how many universes there are is one, only one universe. And a few philosophers and mystics might argue that even our own universe is an illusion.

Is everything moving away from each other?

The galaxies outside of our own are moving away from us, and the ones that are farthest away are moving the fastest. ... However, the galaxies are not moving through space, they are moving in space, because space is also moving. In other words, the universe has no center; everything is moving away from everything else.

Will the universe stop expanding?

There is really only one way for the universe to stop expanding: that is if there is enough mass in the universe for the gravity to overcome the expansion. ... If the density in the universe is smaller than the critical density, then the expansion will continue forever.

Which is the predicted scenario if the expansion of the universe will not stop?

The Big Crunch is a hypothetical scenario for the ultimate fate of the universe, in which the expansion of the universe eventually reverses and the universe recollapses, ultimately causing the cosmic scale factor to reach zero, an event potentially followed by a reformation of the universe starting with another Big ...

Is there a black hole at the center of the universe?

Yes, there is a very large black hole at the center of our Galaxy. It has a mass of about three million suns and is very far from Earth at a distance of about 24,000 light-years. Huge black holes are thought to occur naturally at the center of most large galaxies and many have already been detected.

How old do we think the universe is?

Using data from the Planck space observatory, they found the universe to be approximately 13.8 billion years old.

Does the universe have a beginning?

The usual story of the Universe has a beginning, middle, and an end. It began with the Big Bang 13.8 billion years ago when the Universe was tiny, hot, and dense. ... The universe carried on expanding and cooling, but at a fraction of the initial rate.

What is Edge of the universe?

The edge simply marks the dividing line between locations that earthlings can currently see and locations that we currently cannot. And although our observable universe has an edge, the universe as a whole is infinite and has no edge.

How far into the universe can we see?

It's been 13.8 billion years since the Big Bang, which might lead you to expect that the farthest objects we can possibly see are 13.8 billion light-years away. But not only isn't that true, the farthest distance we can see is more than three times as remote: 46.1 billion light-years.

What is outside the unobservable universe?

These 93 some-odd billion light-years contain all of the quarks, quasars, stars, planets, nebulae, black holes…and everything else that we could possibly observe; however, the observable universe only contains the light that has had time to reach us. A lot more universe exists beyond what we are able to observe.