1. Evolving perspectives - a historical prologue

Fig. 1.1.
Stonehenge
Fig. 1.2.
The Sunís trajectory
Fig. 1.3.a
The Moonís varying appearance
Fig. 1.3.b
The Moonís varying appearance
Fig. 1.3.c
The Moonís varying appearance
Fig. 1.3.d
The Moonís varying appearance
Fig. 1.3.e
The Moonís varying appearance
Fig. 1.3.f
The Moonís varying appearance
Fig. 1.3.g
The Moonís varying appearance
Fig. 1.4.
Retrograde loops
Fig. 1.5.
Curved shadow of Earth
Fig. 1.6.
Circles upon circles to explain retrograde loops
Fig. 1.7.
Night and day
Fig. 1.8.
Phases of the Moon
Fig. 1.9.
Retrograde loops in a Copernican Universe
Fig. 1.10.
The seasons
Fig. 1.11.
Elliptical orbit
Fig. 1.12.
Keplerís first and second laws
Fig. 1.13.
Keplerís third law
Fig. 1.14.
Moons of Jupiter
Fig. 1.15.
The Palermo circle
Fig. 1.16.
Asteroid belt
Fig. 1.17.
Refractor and reflector
Fig. 1.18.
Saturnís ring
Fig. 1.19.
Radar-ranging to Venus
Fig. 1.20.
Annual parallax
Fig. 1.21.
Visible solar spectrum
Fig. 1.22.
Bohr atom
Fig. 1.1.
Fig1_1 Distance of Sun
Fig. 1.2.
Fig1_2 Elec Waves
Fig. 1.3.
Fig1_3 Electromagnetic spectrum
Fig. 1.4.
Fig1_4 The Sun's angular size and radius
Fig. 1.5.
Fig1_5 Black body radiation
Fig. 1.6.
Fig1_6 Telescopes
Fig. 1.7.
Fig1_7 Interferometer

Copyright 2010, Professor Kenneth R. Lang, Tufts University