Astronomy 9/1

We explored the geometry of Inferior and Superior planets compared to the orbit of the Earth.
New vocabulary:

• conjunction
• inferior conjunction
• superior conjunction
• greatest western elongation
• greatest eastern elongation
• opposition
• western quadrature
• eastern quadrature

We also began reckoning the differences in time-keeping between "normal" humans and astronomers.

• Solar day
• Sidereal day