The videos introduce the role and discoveries of Albert Einstein and Edwin Hubble in astronomy, and some concepts we will need at the lecture. Watch these three videos (total time ~20 minutes), and pay attention to the keywords given for each clip -- they contain important ideas in understanding the lecture and the homework.

For reflection: These videos have very different styles and approaches. Some explain things slowly and widely, while some look like the director feared the audience falls asleep if the same view is shown for more than two seconds. Note in your learning diary if some of the videos (mainly on this page, but why not also elsewhere during this course) specifically appeal to you. It's one more way to think about your learning reflectively.

If the videos below don't show, clicking the title takes you to YouTube.

You don't need to return anything for this preliminary task -- just be sure to watch the videos before the lecture, and really try to understand the basic concepts given for each video.


1. Hubble Supernova (8:31)

Keywords and concepts: supernova remnants

Note: supernovae is the plural of supernova (from Latin), but also the plural form supernovas is sometimes used. They mean the same thing, anyway.


2. Gravity - From Newton to Einstein (9:30)

Keywords and concepts: Differences between Newton's and Einstein's theories of gravitation; Speciality of the speed of light; Curvature of space



3. Hubble's Law, the Doppler Effect, and an Expanding Universe (4:37)

Keywords and concepts: Hubble's law, Expansion of the Universe




Last modified: Tuesday, 15 February 2022, 2:58 PM