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This is an activity about determining the distance of a solar flare from the center of the Sun's disk. Learners will use transparency grids overlaid on images of the Sun in order to calculate the distance of a solar flare, similar to a signal detection method used by scientists. This is the second activity in the lesson "How Does HESSI Take a Picture?" NOTE: The HESSI mission was renamed RRHESSI (Reuven Ramaty High Energy Solar Spectroscope Imager) after Dr. Reuven Ramaty, who was the original Co-Investigator for this NASA mission, and was a pioneer in the fields of solar physics, gamma-ray astronomy, nuclear astrophysics, and cosmic rays.
This resource is located on page 3 of the PDF document.