They use a Java applet to measure and graph the areas of sunspots in white light images and active regions in x-ray images. By comparing the two areas, students investigate if a correlation exists between the two. Students can compare their data with others by making their own plots, using printable student work sheets for plotting areas vs. time or sunspot vs. x-ray areas. Students learn about the importance of solar observations in ancient cultures and how solar science changed with the advent of telescopes. Students learn how to view the Sun safely using a simple projector, with or without a telescope.
Students are able to discuss some of the main currents of modern solar research.
Students can conduct comparisons of sunspot images taken in white light and X-ray wavelengths, and make a case for correlation or lack of correlation between these features.