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Gravity. All of the stars of a galaxy are all attracted to each other. This attraction is weak because the stars are very far apart but it is enough to keep the galaxies together. There is also a large amount of matter that has never been seen (called “dark matter”) that helps keep galaxies together.
Contents
- 1 What happens when galaxies clustered together under gravity?
- 2 What role do galaxies play in the universe?
- 3 What do we mean when we say that the universe is expanding?
- 4 When did humans learn that the Earth is not the center of the universe?
- 5 What is the most important era for the creation of everything in the universe?
- 6 What is the best theory that explains the origin of the universe?
- 7 Who created the world?
- 8 How can the universe be infinite and expanding?
- 9 Does black hole have gravity?
- 10 Does dark matter have gravity?
- 11 What creates gravity in space?
What happens when galaxies clustered together under gravity?
Astronomers think that galaxy clusters form as clumps of dark matter and their associated galaxies are pulled together by gravity to form groups of dozens of galaxies which in turn merge to form clusters of hundreds even thousands of galaxies. … The gas in galaxy clusters is heated as the cluster is formed.
What role do galaxies play in the universe?
Why Is It Important to Understand Galaxies? Galaxies show us how the matter in the universe is organized on large scales. In order to understand the nature and history of the universe scientists study how the matter is currently organized and how that organization has changed through out cosmic time.
What do we mean when we say that 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.
When did humans learn that the Earth is not the center of the universe?
The mysterious dark matter is the fastest-moving material in the universe. When did humans learn that the Earth is not the center of the universe? A. About 1 000 years ago.
What is the most important era for the creation of everything in the universe?
See images illustrations and diagrams of the universe from now back to the Big Bang. The widely accepted theory for the origin and evolution of the universe is the Big Bang model which states that the universe began as an incredibly hot dense point roughly 13.7 billion years ago.
What is the best theory that explains the origin of the universe?
the big bangThe best-supported theory of our universe’s origin centers on an event known as the big bang. This theory was born of the observation that other galaxies are moving away from our own at great speed in all directions as if they had all been propelled by an ancient explosive force.Jan 17 2017
See also what is produced when fossil fules containing sulfur are burnt?
Who created the world?
According to Christian belief God created the universe. There are two stories of how God created it which are found at the beginning of the book of Genesis in the Bible. Some Christians regard Genesis 1 and Genesis 2 as two totally separate stories that have a similar meaning.
How can the universe be infinite and 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.
Does black hole have gravity?
Black holes are points in space that are so dense they create deep gravity sinks. Beyond a certain region not even light can escape the powerful tug of a black hole’s gravity.
Does dark matter have gravity?
Dark energy
It is distributed evenly throughout the universe not only in space but also in time – in other words its effect is not diluted as the universe expands. The even distribution means that dark energy does not have any local gravitational effects but rather a global effect on the universe as a whole.
What creates gravity in space?
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