Which statements describe elliptical galaxies? Select the two correct answers.(1 point)
Responses
They include the Milky Way.
They include the Milky Way.
They are the most common galaxy type.
They are the most common galaxy type.
They include the universe's largest galaxies.
They include the universe's largest galaxies.
They typically contain very little gas and dust.
They typically contain very little gas and dust.
How does the appearance of spiral galaxies vary? Select the two correct answers.(1 point)
Responses
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 are more elongated in shape than others.
Some are more elongated in shape than others.
Some have a band of stars and materials through their middle, but others do not.
Some are more elongated in shape than others.
Some have a band of stars and materials through their middle, but others do not.
According to astronomers, how many galaxies are distributed across the observable universe?(1 poin
According to astronomers, there are estimated to be billions of galaxies distributed across the observable universe.
The correct statements are:
1. They are the most common galaxy type.
2. They typically contain very little gas and dust.
The correct answers are:
- They are the most common galaxy type.
- They typically contain very little gas and dust.
To determine the correct answers, we can use our knowledge about elliptical galaxies or look for reliable sources of information.
Elliptical galaxies are one of the main types of galaxies in the universe. They are characterized by their smooth, oval-shaped appearance. Here's how we can find the correct answers:
1. They include the Milky Way: This statement is incorrect. The Milky Way is not an elliptical galaxy; it is a spiral galaxy. We can eliminate this option as it does not describe elliptical galaxies.
2. They are the most common galaxy type: This statement is correct. Elliptical galaxies are indeed the most common type of galaxy in the universe. They outnumber spiral galaxies and irregular galaxies. This option accurately describes elliptical galaxies.
3. They include the universe's largest galaxies: This statement is correct. Elliptical galaxies are known to be some of the largest galaxies in the universe. They can range in size from dwarf ellipticals to giant ellipticals. This option accurately describes elliptical galaxies.
4. They typically contain very little gas and dust: This statement is correct. Unlike spiral galaxies which have well-defined arms and contain a lot of gas and dust, elliptical galaxies have a more featureless shape and contain very little gas and dust. This option accurately describes elliptical galaxies.
By evaluating each statement based on our knowledge or researching the characteristics of elliptical galaxies, we can determine that the two correct statements are:
- They are the most common galaxy type.
- They typically contain very little gas and dust.