According to astronomers, how many galaxies are distributed across the observable universe?(1 point) Responses 100 billion 100 billion 1 trillion 1 trillion several thousand several thousand 50

According to astronomers, there are 100 billion galaxies distributed across the observable universe.

Which component that makes up the bulk of all galaxies?(1 point) Responses dust dust stars stars dark matter dark matter gas

The component that makes up the bulk of all galaxies is stars.

Which statements describe elliptical galaxies? Select the two correct answers.(1 point) Responses They typically contain very little gas and dust. They typically contain very little gas and dust. They include the universe's largest galaxies. They include the universe's largest galaxies. They include the Milky Way. They include the Milky Way. They are the most common galaxy type.

The correct statements describing elliptical galaxies are:

1. They typically contain very little gas and dust.
2. They include the universe's largest galaxies.

How does the appearance of spiral galaxies vary? Select the two correct answers.(1 point) Responses Some are more elongated in shape than others. Some are more elongated in shape than others. They vary in the brightness of stars located on their arms. They vary in the brightness of stars located on their arms. They vary in how tightly their arms are wound. They vary in how tightly their arms are wound. Some have a band of stars and materials through their middle, but others do not.

The correct statements describing the appearance of spiral galaxies are:

1. Some are more elongated in shape than others.
2. They vary in how tightly their arms are wound.