It's About Time
The Doppler Effect
In 1842, Christian Doppler proposed a theory relating the change of wavelengths based on motion. Young scholars observe the Doppler Effect on a small scale in a ball, on a larger scale from a car, and on the largest scale studying the...
Curated OER
The Speed of Galaxy Q2125-431
In this speed of a galaxy learning exercise, students use a given equation for the speed of an object and they use the spectral lines for Hydrogen Alpha and Beta from the Seyfert galaxy to answer 6 questions. They determine the observed...
Curated OER
Galaxies and the Universe
In this galaxies worksheet, students review 12 terms associated with the Milky Way and galaxies in general. Students fill in the blank of 12 statements.