Question

pre - practice (use google): 1. what does the \h - r\ stand for when we talk about an h - r diagram? hertz russel 2. describe what an h - r diagram is in your own words! a graph or statistic of stars and colors on the horizontal and vertical axis 3. what does luminosity mean? (in your own words) nice quality part i: click on \hr diagram\ to fill out the table. color of star groups, size of the star (small, medium, large), temperature (k), luminosity (brightness) (low, medium, high), location (top left corner, bottom left, bottom)

Explanation:

1. The "H - R" in an H - R Diagram stands for Hertzsprung - Russell, named after Ejnar Hertzsprung and Henry Norris Russell who independently developed the diagram.
2. An H - R Diagram is a graphical representation that plots stars based on their luminosity (brightness) and temperature (or spectral type). It helps astronomers understand the life - cycle and characteristics of stars.
3. Luminosity refers to the total amount of energy a star radiates per second. It is a measure of the star's intrinsic brightness, independent of its distance from Earth.

For the table:

• Orange: Size - medium; Temperature - 3500 - 5000K; Luminosity - medium; Location - middle left
• Yellow: Size - medium; Temperature - 5000 - 6000K; Luminosity - medium; Location - middle
• White: Size - small, medium; Temperature - 6000 - 10000K; Luminosity - medium, high; Location - middle right
• Blue: Size - large; Temperature - >10000K; Luminosity - high; Location - top right

Answer:

1. Hertzsprung - Russell
2. A graphical representation of stars based on luminosity and temperature to understand star characteristics and life - cycles.
3. The total amount of energy a star radiates per second, an intrinsic measure of its brightness.

Orange: Size of the Star - medium; Temperature (K) - 3500 - 5000; Luminosity (Brightness) - medium; Location - middle left
Yellow: Size of the Star - medium; Temperature (K) - 5000 - 6000; Luminosity (Brightness) - medium; Location - middle
White: Size of the Star - small, medium; Temperature (K) - 6000 - 10000; Luminosity (Brightness) - medium, high; Location - middle right
Blue: Size of the Star - large; Temperature (K) - >10000; Luminosity (Brightness) - high; Location - top right