Galaxies & the Universe

Front

What is the most common type of galaxy in the universe?

Back

Spiral galaxies are the most common type of galaxy in the universe.

Front

What type of galaxy is characterized by a smooth, featureless light profile?

Back

Elliptical galaxies are characterized by a smooth, featureless light profile.

Front

What type of galaxy has no defined shape and often contains young stars?

Back

Irregular galaxies have no defined shape and often contain young stars.

Front

What does AGN stand for in the context of galaxies?

Back

AGN stands for Active Galactic Nucleus, which is the core of a galaxy where highly energetic objects are located.

Front

What are quasars?

Back

Quasars are the most distant objects ever observed from Earth, powered by supermassive black holes at the centers of galaxies.

Front

What is the primary component of spiral galaxies?

Back

The primary component of spiral galaxies is a flat, rotating disk containing stars, gas, and dust, along with a central concentration of stars known as the bulge.

Front

What is the difference between barred spiral and regular spiral galaxies?

Back

Barred spiral galaxies have a central bar-shaped structure made of stars, while regular spiral galaxies do not.

Front

What is dark matter and its significance in galaxies?

Back

Dark matter is a form of matter that does not emit light or energy, making it invisible; it is significant because it makes up a large portion of the total mass in galaxies and affects their gravitational behavior.

Front

What is the role of supermassive black holes in galaxies?

Back

Supermassive black holes are found at the centers of most galaxies and play a crucial role in their formation and evolution.

Front

What are the main types of galaxies?

Back

The main types of galaxies are spiral, elliptical, and irregular.