How are galaxies distributed throughout the universe?
Galaxies are not distributed randomly throughout the universe, but are grouped in graviationally bound clusters. These clusters are called poor or rich depending on how many galaxies they contain. Poor clusters are often called groups.
Are galaxies spread evenly throughout the universe?
Most galaxies are spread evenly throughout the universe. The Milky Way belongs to a small cluster of galaxies called the Local Group.
How are the galaxies connected?
Cosmic filaments are huge bridges of galaxies and dark matter that connect clusters of galaxies to each other. They funnel galaxies toward and into large clusters that sit at their ends.
Do galaxies move away from each other?
Hubble's law explains that the reason most galaxies are moving away from one another is because the whole universe is expanding. Pick any two galaxies at random, and the chances are they're moving away from each other.
How are galaxy spread throughout the universe quizlet?
How are galaxies spread throughout the universe? Clusters of galaxies exist that are themselves often clustered into superclusters. Clusters and superclusters appear to be distributed on surfaces surrounding empty regions of space.
How are galaxies distributed in space quizlet?
How are galaxies organized and distributed within the universe? Galaxies are typically organized into clusters and distributed (not scattered randomly) across the universe. In clusters, galaxies are held together by the force of gravity. If a cluster contains numerous galaxies, then it is a supercluster.
Does the universe have a center?
No matter how we try to define and identify it, the universe simply has no center. The universe is infinite and non-rotating. Averaged over the universal scale, the universe is uniform.
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).
What force holds galaxies together?
Our galaxy, the Milky Way, is typical: it has hundreds of billions of stars, enough gas and dust to make billions more stars, and at least ten times as much dark matter as all the stars and gas put together. And it's all held together by gravity.
What holds most galaxies together?
Most galaxies are not alone in the vast expanse of space, but are connected to one or more other galaxies by gravity. The same force that holds you onto the Earth can keep many individual galaxies bound together.
Do galaxies orbit anything?
Every object in the galaxy is in orbit around the center of the combined mass of the galaxy.
What would happen to galaxies without gravity?
What would happen to galaxies without gravity? They would fall apart.
What does Hubble’s Law describe?
Hubble's law, which says simply that a galaxy's velocity (or as is sometimes plotted, its redshift) is directly proportional to its distance, also tells us something important about the state of the universe. If the universe is static and unchanging, there should be no correlation between distance and velocity.
What would happen if the Andromeda Galaxy collide with the Milky Way?
Our Milky Way galaxy is destined to collide with our closest large neighbour, the Andromeda galaxy, in about five billion years. Scientists can predict what's going to happen. The merger will totally alter the night sky over Earth but will likely leave the solar system unharmed, according to NASA.
What is beyond our universe?
Outside the bounds of our universe may lie a "super" universe. Space outside space that extends infinitely into what our little bubble of a universe may expand into forever. Lying hundreds of billions of light years from us could be other island universes much like our own.
Is there an edge of the universe?
As far as we can tell, there is no edge to the universe. Space spreads out infinitely in all directions. Furthermore, galaxies fill all of the space through-out the entire infinite universe. This conclusion is reached by logically combining two observations.
Who created universe?
Many religious persons, including many scientists, hold that God created the universe and the various processes driving physical and biological evolution and that these processes then resulted in the creation of galaxies, our solar system, and life on Earth.
How does gravity keep the Milky Way galaxy together?
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.
Do black holes keep galaxies together?
The central black hole is impressive, and a feature of the galaxy, but it's completely insignificant in terms of holding the galaxy together. If it suddenly vanished, some stars near the middle would change their orbits, but the galaxy as a whole would be almost totally unaffected.
How are galaxies clustered?
A galaxy cluster, or cluster of galaxies, is a structure that consists of anywhere from hundreds to thousands of galaxies that are bound together by gravity with typical masses ranging from 1014–1015 solar masses.
Is our galaxy orbiting a black hole?
Astronomers have unveiled the first image of the supermassive black hole at the centre of our own Milky Way galaxy. This result provides overwhelming evidence that the object is indeed a black hole and yields valuable clues about the workings of such giants, which are thought to reside at the centre of most galaxies.
Why are black holes at the center of galaxies?
Stellar black holes result from the collapse of massive stars, and some have suggested that supermassive black holes form out of the collapse of massive clouds of gas during the early stages of the formation of the galaxy.
What if we lost gravity for 5 seconds?
If our planet were to lose gravity for even five seconds, it would spell the end of life on Earth as we know it. Gravity pulls objects toward one another. The more massive an object is, the stronger its gravitational pull. The closer you are to an object, the stronger its gravitational pull.
What would happen if gravity stopped for 1 second?
When gravity disappears for 1 second the outwards force balanced by the gravity would be released causing a massive explosion. In other star systems with more immense stars and natural phenomena such as pulsars and and especially black holes the explosions and expansions would be greater.
How will the universe end?
At some point, the universe might stop growing because of the gravitational pull of all the matter inside of it, and then it would start to collapse back into itself. The final result would be a universe that reaches a tiny singularity, a dark reflection of the Big Bang.
Why is dark matter called dark matter?
To account for this, the mass of the galaxy within the orbit of the stars must increase linearly with the distance of the stars from the galaxy's centre. However, no light is seen from this inner mass—hence the name “dark matter.”
How long until the Milky Way dies?
Scientists suppose that in about four billion years the star formation will stop, which is almost just a blink of an eye in the life cycle of the universe. The Milky Way is dying and we don't know why.
Will humans survive Andromeda collision?
Luckily, experts think that Earth will survive, but it won't be entirely unaffected. The collision will unfold right in front of us, changing the night sky to look like nothing any human has seen before.
How cold is space?
In fact, it doesn't actually have a temperature at all. Temperature is a measurement of the speed at which particles are moving, and heat is how much energy the particles of an object have. So in a truly empty region space, there would be no particles and radiation, meaning there's also no temperature.
Who created the God?
We ask, "If all things have a creator, then who created God?" Actually, only created things have a creator, so it's improper to lump God with his creation. God has revealed himself to us in the Bible as having always existed. Atheists counter that there is no reason to assume the universe was created.