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Galactic Dwarf Galaxies and Satellite Galaxies

Description: Galactic Dwarf Galaxies and Satellite Galaxies Quiz
Number of Questions: 15
Created by:
Tags: astrophysics galaxies dwarf galaxies satellite galaxies
Attempted 0/15 Correct 0 Score 0

What is the typical mass range of a dwarf galaxy?

  1. 10^5 - 10^6 solar masses

  2. 10^7 - 10^8 solar masses

  3. 10^9 - 10^10 solar masses

  4. 10^11 - 10^12 solar masses


Correct Option: A
Explanation:

Dwarf galaxies are typically much smaller than spiral or elliptical galaxies, with masses ranging from 10^5 to 10^6 solar masses.

Which of the following is not a type of dwarf galaxy?

  1. Elliptical dwarf galaxy

  2. Spheroidal dwarf galaxy

  3. Irregular dwarf galaxy

  4. Spiral dwarf galaxy


Correct Option: D
Explanation:

Spiral dwarf galaxies are not a recognized type of dwarf galaxy. Dwarf galaxies are typically classified as elliptical, spheroidal, or irregular.

What is the most common type of dwarf galaxy?

  1. Elliptical dwarf galaxy

  2. Spheroidal dwarf galaxy

  3. Irregular dwarf galaxy

  4. All of the above


Correct Option: D
Explanation:

All three types of dwarf galaxies (elliptical, spheroidal, and irregular) are common. The relative abundance of each type is still a matter of debate.

Where are dwarf galaxies typically found?

  1. In the outskirts of large galaxies

  2. In galaxy clusters

  3. In the intergalactic medium

  4. All of the above


Correct Option: D
Explanation:

Dwarf galaxies can be found in all of these locations. They are often found orbiting larger galaxies, but they can also be found in galaxy clusters or even in the intergalactic medium.

What is the largest known dwarf galaxy?

  1. The Large Magellanic Cloud

  2. The Small Magellanic Cloud

  3. Draco Dwarf Galaxy

  4. Ursa Minor Dwarf Galaxy


Correct Option: A
Explanation:

The Large Magellanic Cloud is the largest known dwarf galaxy, with a mass of about 10^10 solar masses.

What is the smallest known dwarf galaxy?

  1. The Large Magellanic Cloud

  2. The Small Magellanic Cloud

  3. Draco Dwarf Galaxy

  4. Ursa Minor Dwarf Galaxy


Correct Option: D
Explanation:

The Ursa Minor Dwarf Galaxy is the smallest known dwarf galaxy, with a mass of only about 10^5 solar masses.

What is the average distance between a dwarf galaxy and its host galaxy?

  1. 100 kpc

  2. 1 Mpc

  3. 10 Mpc

  4. 100 Mpc


Correct Option: A
Explanation:

The average distance between a dwarf galaxy and its host galaxy is about 100 kpc.

What is the typical orbital period of a dwarf galaxy around its host galaxy?

  1. 10^8 years

  2. 10^9 years

  3. 10^10 years

  4. 10^11 years


Correct Option: B
Explanation:

The typical orbital period of a dwarf galaxy around its host galaxy is about 10^9 years.

What is the fate of a dwarf galaxy that falls into a larger galaxy?

  1. It is destroyed by the larger galaxy

  2. It merges with the larger galaxy

  3. It is ejected from the larger galaxy

  4. It remains intact and orbits the larger galaxy


Correct Option: B
Explanation:

When a dwarf galaxy falls into a larger galaxy, it is typically tidally disrupted and merges with the larger galaxy.

What is the role of dwarf galaxies in galaxy formation and evolution?

  1. They provide building blocks for larger galaxies

  2. They help to regulate star formation in larger galaxies

  3. They contribute to the dark matter content of larger galaxies

  4. All of the above


Correct Option: D
Explanation:

Dwarf galaxies play a role in all of these processes. They provide building blocks for larger galaxies, they help to regulate star formation in larger galaxies, and they contribute to the dark matter content of larger galaxies.

What are the Magellanic Clouds?

  1. Two dwarf galaxies that orbit the Milky Way

  2. Two globular clusters in the Milky Way

  3. Two open clusters in the Milky Way

  4. Two nebulae in the Milky Way


Correct Option: A
Explanation:

The Magellanic Clouds are two dwarf galaxies that orbit the Milky Way. They are the closest dwarf galaxies to the Milky Way and are visible to the naked eye from the Southern Hemisphere.

What is the largest satellite galaxy of the Milky Way?

  1. The Large Magellanic Cloud

  2. The Small Magellanic Cloud

  3. Draco Dwarf Galaxy

  4. Ursa Minor Dwarf Galaxy


Correct Option: A
Explanation:

The Large Magellanic Cloud is the largest satellite galaxy of the Milky Way, with a mass of about 10^10 solar masses.

What is the smallest satellite galaxy of the Milky Way?

  1. The Large Magellanic Cloud

  2. The Small Magellanic Cloud

  3. Draco Dwarf Galaxy

  4. Ursa Minor Dwarf Galaxy


Correct Option: D
Explanation:

The Ursa Minor Dwarf Galaxy is the smallest satellite galaxy of the Milky Way, with a mass of only about 10^5 solar masses.

How many satellite galaxies does the Milky Way have?

  1. 10

  2. 20

  3. 30

  4. 40


Correct Option: D
Explanation:

The Milky Way has about 40 known satellite galaxies.

What is the future of the Magellanic Clouds?

  1. They will merge with the Milky Way

  2. They will be ejected from the Milky Way

  3. They will remain in orbit around the Milky Way

  4. They will collide with each other


Correct Option: A
Explanation:

The Magellanic Clouds are expected to merge with the Milky Way in about 4 billion years.

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