How can the universe be infinite but expanding?

Although space may have been concentrated into a single point at the Big Bang, it is equally possible that space was infinite at the Big Bang. In both scenarios the space was completely filled with matter which began to expand. There is no centre of the expansion, the universe is simply expanding at all points.

Will the universe continue to expand or contract because of 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.

What is believed to be causing the expansion of the universe to be speeding up?

The curve changes noticeably about 7.5 billion years ago, when objects in the universe began flying apart as a faster rate. Astronomers theorize that the faster expansion rate is due to a mysterious, dark force that is pulling galaxies apart. One explanation for dark energy is that it is a property of space.

Is there an infinite amount of matter?

In mass, matter, and energy yes probably finite. In time and space, infinite.

Is universe always infinite?

If the universe is infinite, it has always been infinite. At the Big Bang, it was infinitely dense. Since then it has just been getting less dense as space has expanded. Imagine a large flat rubber sheet with sand placed as closely together as possible on the sheet.

What force causes the universe to expand?

The energy from the Big Bang drove the universe’s early expansion. Since then, gravity and dark energy have engaged in a cosmic tug of war. Gravity pulls galaxies closer together; dark energy pushes them apart. Whether the universe is expanding or contracting depends on which force dominates, gravity or dark energy.

Is the expansion of the universe increasing or decreasing?

Until recently, astronomers fully expected to see gravity slowing down the expansion of the cosmos. In 1998, however, researchers discovered the repulsive side of gravity. And this explanation, in turn, led to the conclusion that the expansion of the universe is actually speeding up, not slowing down.

Why is the expansion of the universe slowing down?

It was only about 50 years ago that astronomers thought the expansion of the universe was slowing down because of its inherent matter. That is, since every bit of matter has its own gravity and considering how much gravity must exist to hold the universe together as it is, it was thought that the expansion would stop and contraction began.

Is the universe infinite or finite?

If the universe is infinite, it has always been infinite. At the Big Bang, it was infinitely dense. Since then it has just been getting less dense as space has expanded. Imagine a large flat rubber sheet with sand placed as closely together as possible on the sheet.

How did astronomers determine the gravity of the universe?

Then astronomers did an atom count of sorts. That is, they figured out how much mass they could see throughout the universe and from that calculate its associated gravity. But when the counting was done, they discovered there exists far too much gravity in the universe to be explained by the universe we can see.