cluster
Definition
A cluster is a group of things that are close together. In science, the word cluster is often used to describe groups of stars, galaxies, or atoms.
Star clusters are groups of stars that are gravitationally bound together. They can be found in all parts of the galaxy, and they come in a variety of sizes. Some star clusters are just a few stars, while others can contain thousands or even millions of stars.
Galaxy clusters are groups of galaxies that are gravitationally bound together. They are the largest structures in the universe, and they can contain hundreds or even thousands of galaxies.
Atomic clusters are groups of atoms that are held together by chemical bonds. They are much smaller than star clusters or galaxy clusters, but they are still important for understanding the structure of matter.
Clusters are important because they can help us understand the formation and evolution of stars, galaxies, and atoms. For example, star clusters can help us to understand how stars are born and how they die. Galaxy clusters can help us to understand how galaxies interact with each other and how the universe is expanding. Atomic clusters can help us to understand how matter is structured and how it behaves.
Here are some of the key things to know about clusters:
- They are groups of things that are close together.
- They can be found in all parts of the universe.
- They come in a variety of sizes.
- They are important for understanding the formation and evolution of stars, galaxies, and atoms.
How can the word be used?
The stars were clustered in the sky.
Different forms of the word
Noun: cluster (plural: clusters).
Adjective: clustered.
Verb: to cluster.
Etymology
The word "cluster" comes from the Middle English word "clustre", which means "a bunch of grapes". The Middle English word "clustre" is thought to come from the Old English word "clustor", which also means "a bunch of grapes".
Question
What is a cluster?
AQA Science Exam Question and Answer
Question:
What are some examples of clusters in astronomy?
Answer:
In astronomy, a cluster refers to a group of stars that are gravitationally bound together. There are many different types of clusters, each with its own unique properties.
Some examples of clusters in astronomy include:
Open clusters: Open clusters are relatively loose collections of stars that are typically found in the spiral arms of galaxies. They contain a few hundred to a few thousand stars.
Globular clusters: Globular clusters are tightly packed collections of stars that are found in the halo of galaxies. They contain millions of stars.
Star clusters: Star clusters are a type of stellar nursery where stars are born. They are typically found in the spiral arms of galaxies.
Galaxies: Galaxies are clusters of stars, gas, and dust that are held together by gravity. There are many different types of galaxies, each with its own unique properties.
The study of clusters is important for understanding the formation and evolution of stars and galaxies. By studying clusters, astronomers can learn about the conditions under which stars are born and how galaxies grow and evolve.