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.
Related Resources:
FUND ME!
Categories: Lab/Student Activity
The students will be researching the costs and benefits of space exploration in order to determine whether the Canadian Space Agency should receive increased funding for their programs or if another... read more
BIODIVERSITY IS THE BEST! GRADE 6
Categories: Lab/Student Activity, Lesson Plan, Unit Plan
In this inquiry-based unit, the students will learn that conserving and protecting our water supply is crucial after they research the biodiversity of a specific ecosystem and discover that water is... read more
WHAT MAKES HABITATS CHANGE? (GRADE 4)
Categories: Lab/Student Activity, Lesson Plan
The students will be given images of different locations that show before human impact on the natural environment, and how nature affects a similar location (e.g. flood). They will begin using the... read more