Podcast
Questions and Answers
What celestial feature is marked on many terrestrial globes?
What celestial feature is marked on many terrestrial globes?
an analemma
What is the scale of a globe with a diameter of one foot in imperial units?
What is the scale of a globe with a diameter of one foot in imperial units?
1:42 million
Who established the sphericity of the Earth, and when did it occur?
Who established the sphericity of the Earth, and when did it occur?
Greek astronomy in the 3rd century BC
