An Astronomer Studying a Distant Cluster of Galaxies Finds That

question 33

Multiple Choice

An astronomer studying a distant cluster of galaxies finds that several of the galaxies are spiral-shaped, with a nuclear region of moderate size and moderately wound arms. How should the astronomer classify these galaxies?

• A) SBa
• B) Sc
• C) Sb
• D) Sa

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Definitions:

Indicator Species

Organisms used to assess the health of an ecosystem or the presence of environmental conditions such as pollutants due to their sensitivity to changes.

Indicator Species

Species that reflect the ecological condition of an environment, often used to monitor environmental health or pollution levels.

Extinct

A status describing species that no longer exists anywhere on Earth.

Amphibians

Cold-blooded vertebrates that include frogs, toads, salamanders, and newts, known for their ability to live both in water and on land during different life stages.