The Astronomer Who First Introduced the Model Shown Below Was

question 17

Multiple Choice

The astronomer who first introduced the model shown below was:

• A) Ptolemy.
• B) Johannes Kepler.
• C) Nicolaus Copernicus.
• D) Galileo Galilei.

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Definitions:

Vaccine

A biological preparation that provides active acquired immunity to a particular infectious disease, often containing agents that resemble the disease-causing microorganism.

Phenomenon

An observable event or fact that is often remarkable or unusual, studied across scientific and philosophical fields.

Acute Infections

Infections that have a rapid onset and typically a brief duration, often leading to noticeable symptoms and requiring immediate treatment.

Chronic Infections

Long-term infections that persist for months or years, often due to the inability of the immune system to clear the pathogen.