H.R. Diagram
Blue- Hottest
Red- Coolest
y axis- brightness (the higher, the brighter)
x axis-
*Main Sequence
-Sun is in it
-the brighter it is, the hotter it is.
1. Along the top of the diagram you see the different colors of stars. What colors do you find there? different shades of blue, white, yellow, orange and red
2. This diagram is like a graph. What variable is found along x-axis? temperature.
3. What is unusual about the direction of variables along the x-axis? the temperature decreases as the scale increases.
4. What variable is found along the side, or y-axis? Brightness
5. Stars that are burning hydrogen are in the Main Sequence of stars.
-Name a yellow main sequence star. Centauri B
-Name a blue main sequence star. Bellatrix
-Name a red main sequence star. Bernard's star
6. Supergiant stars are those of at least 100 times that of our Sun.
-Name a white supergiant star. Canopus
-Name a red supergiant star. Betelgeuse
7. Name two other types of stars found on the diagram. Red giant and white dwarfs.
8. Which star is hotter: Vega or Pollux? Vega
9. Which star is cooler: Polaris or Regulus? Polaris
10. Which star is brighter: Spica or Tau Ceti? Spica
11. Which star is dimmer: Deneb or Mira? Mira
Red- Coolest
y axis- brightness (the higher, the brighter)
x axis-
*Main Sequence
-Sun is in it
-the brighter it is, the hotter it is.
1. Along the top of the diagram you see the different colors of stars. What colors do you find there? different shades of blue, white, yellow, orange and red
2. This diagram is like a graph. What variable is found along x-axis? temperature.
3. What is unusual about the direction of variables along the x-axis? the temperature decreases as the scale increases.
4. What variable is found along the side, or y-axis? Brightness
5. Stars that are burning hydrogen are in the Main Sequence of stars.
-Name a yellow main sequence star. Centauri B
-Name a blue main sequence star. Bellatrix
-Name a red main sequence star. Bernard's star
6. Supergiant stars are those of at least 100 times that of our Sun.
-Name a white supergiant star. Canopus
-Name a red supergiant star. Betelgeuse
7. Name two other types of stars found on the diagram. Red giant and white dwarfs.
8. Which star is hotter: Vega or Pollux? Vega
9. Which star is cooler: Polaris or Regulus? Polaris
10. Which star is brighter: Spica or Tau Ceti? Spica
11. Which star is dimmer: Deneb or Mira? Mira