Awesome science powerpoint for middle school astronomy. Includes: absolute vs apparent magnitude, HR diagram, data collection etc.
Day 1 of our Christmas Science Advent Calendar belongs to Christmas star classification. Practice classification and sorting with sparkly Christmas stars.
Practice science skills of classifying and sorting: Christmas Star Classification
Description: First hired by Harvard College Observatory to carry out astronomical calculations, Annie Jump Cannon eventually became one of the foremost American astronomers, known especially for her work on variable stars.