In this lecture (back from illness, reading week, and the midterm exam!) we talk about "seeing", different telescopes, why we go to high altitudes to build them, and why we build telescopes to operate at different wavelengths (i.e. what different physical phenomena in the Universe emit at different wavelengths). We also begin to talk about radio telescopes.

No podcasts of these lectures due to illness

In this lecture we explore the many uses of Newton's version of Kepler's law as a tool to determine the masses of objects in the Universe. We then move on to Part 2 of the class notes (the Electromagnetic spectrum) and talk about the particle and wave natures of light including concepts of diffraction, interference, wavelength, frequency and energy.

In this lecture we explore Newton's laws of motion and gravity and show how how he unifies terrestrial and celestial motion. We provide and use the equations for gravitational force, gravitational acceleration, and orbital velocity. We also discuss the difference between mass and weight.

In this lecture we finish our discussion of Galileo's contribution to the Heliocentric model and begin to discuss motion in the Universe via a focus on Newton's three laws.