Will the universe continue to expand or will it eventually contract because of the gravity?

If the gravity within the universe is strong enough, it could reign in the expansion and cause the universe to contract. If not, the universe will continue to expand forever. If omega (Ω) is greater than 1, then the universe will be closed. If it’s less than 1, the universe will be open.

What do we mean when we say that the universe is expanding quizlet?

When we say the universe is expanding, it means the average distances between galaxies are increasing with time. It’s thought that our universe is 14 billion years old; and expansion had to start somewhere, thus creating the idea of the Big Bang.

What does it mean when the universe is expanding?

Answer. When scientists talk about the expanding universe, they mean that it has been growing ever since its beginning with the Big Bang. In other words, the universe has no center; everything is moving away from everything else.

Can 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.

How long will the universe expand?

Assuming that dark energy continues to make the universe expand at an accelerating rate, in about 150 billion years all galaxies outside the Local Supercluster will pass behind the cosmological horizon.

What do we mean when we talk about the expansion of the universe?

The expansion of the universe is the increase in distance between any two given gravitationally unbound parts of the observable universe with time. It is an intrinsic expansion whereby the scale of space itself changes. The universe does not expand “into” anything and does not require space to exist “outside” it.

Which of the following best describes the the expansion of the universe?

Q. Which of the following best describes the expansion of the universe? As space expands, matter spreads out to fill up the empty space.

Why is the expansion of the universe accelerating?

In the denser regions, the expansion is slowed by a higher gravitational attraction. Therefore, the inward collapse of the denser regions looks the same as an accelerating expansion of the bubbles, leading us to conclude that the universe is undergoing an accelerated expansion.

What is the definition of the universe expanding?

It is an intrinsic expansion whereby the scale of space itself changes. The universe does not expand “into” anything and does not require space to exist “outside” it. Technically, neither space nor objects in space move. Instead it is the metric governing the size and geometry of spacetime itself that changes in scale.

What would happen to coins in an expanding universe?

In an expanding universe, the squares would stretch and grow equally in all directions and the coins would be carried along, like corks floating on a river. If you were a creature sitting in one coin ( or galaxy), you’d see all your neighbors move away from you.

What is the modern explanation for the metric expansion of space?

The modern explanation for the metric expansion of space was proposed by physicist Alan Guth in 1979 while investigating the problem of why no magnetic monopoles are seen today.

How does the expansion of the universe relate to general relativity?

As an effect of general relativity, the expansion of the universe is different from the expansions and explosions seen in daily life. It is a property of the universe as a whole and occurs throughout the universe, rather than happening just to one part of the universe.