Since the distances to the stars cannot be measured directly, astronomers use a variety of techniques including triangulation and parallax, comparison of absolute and apparent magnitude, and Cepheid variables. Triangulation is an indirect method of measuring the distance to an object by imagining a triangle between the observer at two positions and the object (see Fig.1). Parallax, as used in this activity, is the apparent motion of a relatively close object when viewed by the observer from two different positions. In this activity, students learn how parallax and triangulation can be used to indirectly measure the distance to stars. Students will also consider the limitations of using parallax to measure the distance to objects that are further away.
Categories: Lab/Student Activity
This project engages students in the inquiry process about butterflies in their school community. They have opportunities to explore the differences in appearance between different insects such as... read more
In this activity, students learn about engineering design by constructing elastic powered cars from everyday materials that can travel in a straight line for a distance of at least 3 meters within a... read more
FNMI - Introduction to Indigenous Knowledge and Western Science Indigenous Knowledge - Preamble Indigenous Knowledge - Understandings and Considerations Indigenous Science in the... read more