This image from the Hubble Space Telescope shows RS Puppis, a Cepheid variable star.
The time needed for this star to brighten, dim, and return to brightness has been used to determine the distance to this star.
Included is an inquiry-based classroom activity that focuses on the image and text.
This image from the Hubble Space Telescope shows the variable star RS Puppis. RS Puppis is an example of a special class of variable stars called Cepheid variables, which have a link between the period and intrinsic brightness of the star. This link allows astronomers to determine the distance to the star. The text explains the historic importance of Cepheid variable stars as mile markers. The lithograph includes a classroom activity.
Teachers can use this lithograph as:
An example of a variable star. Use the inquiry-based classroom activity called In Search of Cepheid Variable Stars that is included with the PDF lithograph.
An engagement tool in an inquiry-based lesson. Have students study the images on the lithograph. Ask them to write down any questions they have about the images. When the students are finished, their questions can be used in a variety of ways:
A content reading tool. Have students read the text on the lithograph and then write a quiz for the class.
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