39 Questions
What is the typical structure of the Universe on the largest scales?
A sponge-like structure with galaxy clusters forming thin walls
What is the approximate age of the Universe in billions of years?
13.7
What is the term for the vast empty regions between galaxy clusters?
Voids
What is the approximate diameter of the observable Universe in billions of light years?
93
What is the term for a larger collection of galaxies that can span tens of millions of light years?
Galaxy cluster
What is a galaxy?
A massive collection of stars, gas, and dust held together by gravity
What is the estimated number of galaxies in the Universe?
Around 100 to 200 billion
What is the approximate distance to the Andromeda Galaxy from the Milky Way?
2.5 million light years
What type of galaxy is the Milky Way?
Spiral
What is the purpose of galactic filaments?
To connect galaxy clusters in a thread-like formation
What is a characteristic of elliptical galaxies?
They contain older stars and less gas and dust
What is the Local Group?
A small collection of galaxies
What is a characteristic of irregular galaxies?
They do not fit into the other categories and have an irregular shape
What is the main difference between a galaxy cluster and a supercluster?
The way they are formed
What is the function of filaments in the structure of the Universe?
To form walls that contain voids
Why is the observable Universe much larger than 13.7 billion light years in diameter?
Because of the expansion of the Universe
What is the name of the supercluster that the Local Group is part of?
Virgo Supercluster
What is the characteristic shape of the Universe on the largest scales?
Sponge-like
What is the primary difference between a galaxy group and a galaxy cluster?
The number of galaxies they contain
Which type of galaxy is characterized by a central bulge and disk-like structure but lacks spiral arms?
Lenticular galaxy
What is the term for the thread-like structure composed of galaxy clusters?
Filament
What is the approximate size of the Milky Way galaxy?
100,000 light years across
What is the characteristic of small galaxies?
They contain a few million stars
How long would it take to travel to the Andromeda galaxy at the speed of light?
2.5 million years
What is the characteristic of barred spiral galaxies?
They have a bar-shaped structure of stars extending from the central bulge
What is the term for the totality of all space, time, matter, and energy?
Universe
What is the primary purpose of galaxy filaments in the structure of the universe?
To connect galaxy clusters and create a network of galaxies
What is the characteristic shape of a lenticular galaxy?
Disk-like with a central bulge but no spiral arms
What is the estimated number of stars in a large galaxy?
Several trillion
What is the term for a collection of galaxies that includes the Milky Way and the Andromeda Galaxy?
Galaxy group
What is the approximate size of the Milky Way galaxy in light years?
100,000
What is the term for the empty regions of space between galaxy clusters?
Void
What is the characteristic of barred spiral galaxies?
Presence of a bar-shaped structure
What is the estimated number of galaxies in the observable universe?
100 billion
What is the main reason for the observable Universe being much larger than 13.7 billion light years in diameter?
Galaxies that emitted light long ago are now much farther away due to the expansion of the Universe
What is the characteristic shape of galaxy clusters on large scales?
Thin walls called filaments
What is the primary difference between a galaxy cluster and a supercluster?
Structure, with superclusters being formed by many galaxy clusters coming together
What is the purpose of the vast empty regions between galaxy clusters?
There is no purpose, they are simply a natural occurrence
What is the correct sequence of galaxy groupings from smallest to largest?
Galaxy, galaxy group, galaxy cluster, supercluster
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