Learners explain why a transiting planet causes a periodic dimming in the light from its parent star. They determine the radius of a planet, and its orbital distance, by analyzing data and manipulating equations. Students compare the...

In this speed of a galaxy activity, 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...

High schoolers practice manipulating algebra formulas with more than one variable. They examine the topics of velocity, wavelength and frequency. They determine the amount of red-shift in a receding star.

Students participate in an estimation and measurement activity to improve their estimates of the size of hail. They hold several different sized wooden balls and record their guesses of the ball's diameters. They compare their estimates.