Students 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...

Learners 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 explore what astronomers are able to examine our galaxy and universe by examining light. They explore in this sub-unit the formation of the universe, commonly called "The Big Bang," and it follows studying from the Light: The...

Students use an ordinary toy to reveal the Doppler effect. The connection is also made to moving cars, and to the shifting of the lines in the absorption or emission spectrum when the distance between a star and Earth is increasing or...

Students demonstrate how stellar spectra measures a star's motion relative to Earth along the line of sight.