H-R Diagrams Hertzsprung-Russell (HR) Diagrams In the early 20th century, after investigating the effects of an object’s temperature and of the color of its radiation, scientists reasoned that there should be a relationship between the temperature of a star and its luminosity. If all stars were alike, those with the same luminosity would have equal temperature and hotter stars would be brighter than cooler ones. Tags: H-R diagramcolor-magnitude diagram
Observing Open Clusters and Making H-R Diagrams Discipline: EducationThis guide describes how to create an H-R diagram for an opencluster by measuring the brightness of stars in two colors. You can dothis with sample data available from the Falukes Telescopes, or withdata from your own observation if you have an account. After doing thisactivity you should be able to:* Use SalsaJ to do photometry for an open cluster in at least 2 colors* Use a spreadsheet to create a color-magnitude diagram (H-R diagram) for the open cluster* Describe how the H-R diagram for a cluster gives us information about its ageTags: H-R diagramopen clusterscolor-magnitude diagram
Life Cycle of Stars Discipline: Education This guide describes the life cycle of stars and the H-R diagram. It also explains how distances to stars and other objects in the universe are measured.Tags: starvariable starspectraH-R diagramprotostarlife cycle
