Parallax angle and parsec
- distance (in pc) = 1/(parallax angle in arcsec)
Big Dipper --> Polaris --> Cassiopeia
Big Dipper --> Arcturus --> Spica
Summer Triangle - Vega, Deneb, Altair
Newton's law of gravitation - and its nature as an "inverse square law"
Weightlessness
Origin of solar system
(Nothing on Moon or phases - yet......)
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