Distances

The video explores the history of measuring astronomical distances, starting with ancient Greek methods to calculate Earth's size and extending to modern techniques for determining distances to stars. It highlights the importance of the astronomical unit and parallax in understanding the solar system and beyond. The video also discusses how brightness and spectroscopy help determine star properties, emphasizing the role of curiosity in scientific discovery.

Discuss the advancements in technology that allowed for more accurate measurements of astronomical distances.

What is a light year and how is it used in astronomy?

How do astronomers use brightness to determine the distance to stars?

What role did curiosity play in the discoveries made by ancient Greeks regarding the Earth and the universe?