Note about viewing the lecture slides in Canvas

If you're viewing the lecture slides while in Canvas, be sure to use the navigation links at the bottom of the slides themselves to go to the next or previous slide. Do NOT use the Canvas "Next" or "Previous" button. The Canvas "Next"/"Previous" buttons take you to the next/previous item in the Canvas module, NOT to the next lecture slide. Scroll down to the bottom of the lecture slide itself to find the lecture slide navigation links.

A Sense of Scale

Size

The scale model from the Astronomy Notes textbook put onto the main Bakersfield College campus (at Panorama Drive). The inner solar system is next to the Math-Science building that houses the Planetarium.

Another Size Scale Model

Compressing the solar system down to the size of a quarter, the next star system would be 80 meters (big steps) away = from Planetarium to the Forum building. Milky Way on this scale is:

milky way size comparison

Time

From the Astronomy Notes textbook introduction chapter: every second in the cosmic calendar = 475 real years, so 24 cosmic calendar days = 1 billion real years.

Another Timescale model

Shrink the 14-billion year history of the universe onto a linear scale that you can pace out. Note how tiny all of recorded human history would be!


Lecture slides (select the links to view the slides)
Scaled model Process of Science Astrology is not Astronomy!

Next slide ->