Order these star structures from smallest to largest: cluster, galaxy, Local Group, and supercluster. A. cluster, supercluster, galaxy, Local Group B. galaxy, Local Group, cluster, supercluster C. Local Group, cluster, supercluster, galaxy D. Local Group, galaxy, cluster, supercluster

The correct answer is option B, that is, galaxy, local group, cluster, supercluster.

Explanation:

A grand collection of dust, gas, and billions of stars with their solar systems is termed as a galaxy. Milky Way is one of the examples of the galaxy, which is held in captivity due to gravity. A group of the galaxy, which also comprises the Milky Way is known as the local group. A local group exhibits a diameter of about 9.8 Mly.  

A composition, which comprises hundreds to thousands of galaxies, which are held in captivity due to gravity is known as the cluster of galaxies or galaxy cluster. It was considered the largest known gravitational bound compositions in the entire universe until the 1980s until the discovery of superclusters took place.  

A huge group of smaller galaxy groups or galaxy clusters is termed as a supercluster. It is the largest known compositions of the universe.  

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