Back to Knowing the Universe: History and Philosophy of Astronomy
University of Arizona

Knowing the Universe: History and Philosophy of Astronomy

This is an introductory level course about the history and philosophy of astronomy, the oldest science. We'll look at how humans learned to ask questions about the universe, and even before the invention of modern instruments like the telescope, learned some amazing things about their place in nature. We will start with prehistoric cultures who kept accurate calendars and move through the time of the Greek philosophers who laid down the rudiments of logic and mathematics and the modern scientific method. We'll then examine the revolutions of Copernicus, Galileo, and Newton that redefined our place in the universe. We will then learn about the revolutions in physics in the early 20th century that redefined our ideas of space and time, mass and energy. Finally, we will discuss how modern cosmology has shown us that we live in an ancient universe (14 billion years old), in one galaxy in a universe of hundreds of billions of galaxies. At the end, will ask questions that don't necessarily have answers. What came before the Big Bang? Is there anything outside our universe? What is reality? We'll finish by looking at the role of life in the universe and ask whether the earth is the only place with biology on it.

Status: Scientific Methods
Status: Mechanics
BeginnerCourse32 hours

Featured reviews

DG

5.0Reviewed Jan 13, 2023

Professor Impey is outstanding in teaching this course, as he displays his generosity to share his amazing knowledge of the astronomy field. Thank you so much for such an enriching experience.

LM

5.0Reviewed Sep 9, 2025

Excellent delivery, Professor Impey, you've turned this science into an artform. Thank you for your work.

LK

5.0Reviewed Mar 21, 2025

An excellent course with important information clearly explained.

XZ

5.0Reviewed Mar 12, 2024

popularized science, made it so easy for everyone to learn, and motivated to learn more...

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