Introduction to Astronomy

What is science?

• A body of knowledge and a method of how that knowledge was learned.

• The study of the universe and its origins.

• A collection of facts about the natural world.

• The process of making observations and forming theories.

Which of the following is true about Earth?

• It is a sphere of mostly molten rock and metal, 13,000 km across, with a 100 km high atmosphere, protected by a magnetic field.

• It is a solid sphere with a thin crust, surrounded by a 1000 km high atmosphere, protected by a gravitational field.

• It is a sphere of mostly water, 13,000 km across, with a 10 km high atmosphere, protected by a magnetic field.

• It is a solid sphere with a molten core, 1300 km across, with a 100 km high atmosphere, protected by a gravitational field.

How has the definition of astronomy evolved?

• It has branched out from just studying celestial objects to include other scientific fields, making its borders fuzzy.

• It now exclusively focuses on space exploration and the development of new telescopes.

• It has become a more specialized field, with strict boundaries between it and other sciences.

• It is now primarily concerned with the study of Earth's atmosphere and its interaction with the sun.

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What is the primary difference between astronomy and astrology?

• Astronomy studies the stars, while astrology studies the planets.

• Astronomy is a scientific study of celestial objects, while astrology is a belief system that claims celestial bodies influence human affairs.

• Astrology uses telescopes, while astronomy does not.

• Astronomy focuses on past events, while astrology predicts future events.

Which of the following models of the universe places Earth at its center, with all other celestial bodies revolving around it?

• Heliocentrism

• Geocentrism

• Cosmology

• Astrology