Brightest cluster galaxy

High school (ages 12+)
Space & Astronomy

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/brightest-cluster-galaxy

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the morphological classification?Predominantly elliptical or lenticular galaxies
2. What is the dominant formation mechanism?Hierarchical merging and accretion of smaller galaxies and galaxy groups
3. Why are brightest cluster galaxies called "cosmic kings"?They are called "cosmic kings" because they are the most massive and luminous members of their cluster, outshining all other galaxies by a large margin.
4. How do brightest cluster galaxies grow so big?They grow by merging with many smaller galaxies that fall into the cluster, a process called hierarchical merging. Over billions of years, these mergers add stars and gas to the galaxy.

Intracluster Medium (ICM): The hot, ionized gas that permeates galaxy clusters, detectable via X-ray emission.
Active Galactic Nucleus (AGN) Feedback: The process by which energy and momentum from an AGN influence the surrounding interstellar and intergalactic medium.
Cosmic Web: The large-scale structure of the universe, characterized by filaments, nodes, walls, and voids.