Which component that makes up the bulk of all galaxies?(1 point)
Responses
dust
dust
dark matter
dark matter
stars
stars
gas
gas
According to astronomers, how many galaxies are distributed across the observable universe?(1 point)
Responses
100 billion
100 billion
several thousand
several thousand
50
50
1 trillion
several thousand
How does the appearance of spiral galaxies vary? Select the two correct answers.(1 point)
Responses
Some have a band of stars and materials through their middle, but others do not.
Some have a band of stars and materials through their middle, but others do not.
Some are more elongated in shape than others.
Some are more elongated in shape than others.
They vary in how tightly their arms are wound.
They vary in how tightly their arms are wound.
They vary in the brightness of stars located on their arms.
- Some have a band of stars and materials through their middle, but others do not.
- They vary in how tightly their arms are wound.
The component that makes up the bulk of all galaxies is:
Stars.