What best describes how galaxies are distributed in the universe today?
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. … Clusters are then grouped together in superclusters which contain dozens of clusters.
What is the best description of the distribution of the galaxies?
What is the best description of the distribution of the galaxies that lie within about 200 Mpc of Earth? The galaxies appear to be arranged in a network of filaments, or strings, surrounding large, empty regions of space known as voids.
What is the distribution of galactic matter on very large scales?
What is the distribution of galactic matter on very large (greater than 100Mpc) scales? Voids are relatively empty regions of space that may be up to 100 Mpc across. Galactic matter is uniformly distributed on scales of 300 Mpc or greater.
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.
Are most galaxies are 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. The Milky Way and the Andromeda Galaxy are two or the smallest members of the Local Group.
What is the general distribution of galaxy colors?
We found that the galaxy distribution is bimodal in all colors in all redshift bins, from which we can classify galaxies into red and blue types. Further, this bimodal distribution has become redder towards present, which suggests the aging of galaxies.
What does a large scale structure of the universe look like?
Explanation: Essentially astronomers think that on the largest scale the structure of the universe resembles a foam (weird, eh?) It seems there are filaments and sheets of galaxies in 3D that surround huge voids.
How is matter distributed throughout the universe?
On very large scales, matter in the Universe is arranged in a wispy network consisting of huge clusters of galaxies, linked to one another by dense filaments of gas and invisible dark matter and interspersed with gigantic cosmic voids: this network of structure is called the 'cosmic web'.
What does a large-scale structure of the universe look like?
Explanation: Essentially astronomers think that on the largest scale the structure of the universe resembles a foam (weird, eh?) It seems there are filaments and sheets of galaxies in 3D that surround huge voids.
What does a galaxy’s rotation curve tell us about the distribution of mass in the galaxy?
The rotation curve tells you the amount of mass inside a given distance from the center. You find how the mass is distributed in the Galaxy by looking at how the amount of enclosed mass changes with the size of the orbits.
What does the large scale structure of the universe look most like?
Explanation: Essentially astronomers think that on the largest scale the structure of the universe resembles a foam (weird, eh?) It seems there are filaments and sheets of galaxies in 3D that surround huge voids.
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.
Which of the following statements best describes what astronomers mean when they say that the universe is expanding?
Which of the following statements best describes what astronomers mean when they say that the universe is expanding? The average distance between galaxies is increasing with time.
Is matter evenly distributed throughout the universe?
No, the highly diverse distribution of cosmic matter that we see in the Universe at present – stars, galaxies, galaxy clusters – has not always been in place.
Why are galaxies in the blue cloud blue?
Except this time, the color of a galaxy is a measure of how quickly it produces stars, called its star formation rate. This is because hot (and therefore blue) stars are extremely bright, despite being relatively rare, so they can make a whole galaxy appear blue.
How is the Milky Way galaxy part of a larger system?
The Milky Way has several satellite galaxies and is part of the Local Group of galaxies, which form part of the Virgo Supercluster, which is itself a component of the Laniakea Supercluster. It is estimated to contain 100–400 billion stars and at least that number of planets.
What is the structure of the universe at the largest scales?
The large-scale structure of the Universe is made up of filaments and voids. When we look closely at the filaments, we find that they can be broken down into superclusters, clusters, galaxy groups, and finally into galaxies.
What is most responsible for shaping the large-scale structure of the universe?
11 Cards in this Set
| Which of the following are candidates for dark matter? | faints stars WIMPS Jupiter-sized objects brown dwarfs |
|---|---|
| What process is most responsible for shaping the large-scale structure of the universe? | Gravity |
| What does the large-scale structure of the universe look most like? | A sponge with many large holes |
Are galaxies evenly distributed?
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.
What is distribution of matter in space?
On very large scales, matter in the Universe is arranged in a wispy network consisting of huge clusters of galaxies, linked to one another by dense filaments of gas and invisible dark matter and interspersed with gigantic cosmic voids: this network of structure is called the 'cosmic web'.
Why does the rotation curve of the Galaxy not decrease at large distances?
The rotation speed is found not to decrease with increasing distance from the galactic center, implying that the mass distribution of the galaxy cannot be concentrated, like the light distribution.
How is the distribution of the mass in the Milky Way galaxy determined?
The mass distribution in the Galaxy is determined by dynamical and photometric methods. Rotation curves are the major tool for determining the dynamical mass distribution in the Milky Way and spiral galaxies.
Why is the large scale structure important?
From the point of view of cosmologists, large-scale structure is extremely important for two main reasons: It places severe constraints on cosmological models, the credibilities of which are partially determined by how well the observed large-scale structure is reproduced both now and at early times.
Which of the following structures is the largest astronomy?
List of the largest cosmic structures
| Structure name (year discovered) | Maximum dimension (in light-years) | Notes |
|---|---|---|
| Virgo Supercluster | 110,000,000 | A part of the Laniakea Supercluster (see above). It also contains the Milky Way Galaxy, which contains the Solar System where Earth orbits the Sun. Reported for Reference. |
What did Hubble discover about the universe?
1373 CincinnatiEdwin Hubble / Discovered
What is meant by redshift?
'Red shift' is a key concept for astronomers. The term can be understood literally – the wavelength of the light is stretched, so the light is seen as 'shifted' towards the red part of the spectrum. Something similar happens to sound waves when a source of sound moves relative to an observer.
Which of the following statements best describes what astronomers mean when they say that the?
Which of the following statements best describes what astronomers mean when they say that the universe is expanding? the average distance between galaxies is increasing with time.
What does Hubble’s law tell us?
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.
Are galaxies evenly distributed in the universe?
Galaxies and dark matter are not spread uniformly across the Universe, and instead have been concentrating, under the pull of gravity, into a weblike structure of clusters and filaments, with enormous voids in between.
Are all galaxies spiral?
In 1936, Hubble debuted a way to classify galaxies, grouping them into four main types: spiral galaxies, lenticular galaxies, elliptical galaxies, and irregular galaxies. More than two-thirds of all observed galaxies are spiral galaxies.