Hr Diagram Color Index. The color index is positive for stars redder than a white star like vega a0 v stars on the hd diagram and negative for stars bluer than a white star like rigel. The smaller the color index the more blue or hotter the object is.
Some are reddish some yellowish some blueish. The table developed in 1901. Total energy emitted by a space object per unit time.
Use this information to decide where the star belongs on the adjacent blank hr graph.
Are very luminous andor very close thus giving them a good relative. The brightness of an object in space as it appears from earth. As a guest you can only use this gizmo for 5 minutes a day. Enter in the information from table 1 to generate an hr diagram.