|Next: 2. The Sky Around Us|
The first week of this course is an introduction to some of the things we find in the Universe -- atoms, light, planets, stars, and galaxies. These lectures also describe a useful way of comparing the sizes, ages, and masses of different astronomical objects.
Video: Powers of Ten
A brief primer on scientific notation, and an on-line test you can take to check your understanding.
A readable explanation of linear and geometric scales (also known as logarithmic scales) as well as an introduction to logarithms. (Note: available as a PDF file only.)
Homework 1: The Sun & You, due 8/30. Answer.
Quiz 1: An Alien Clue?