Download The Hertzsprung – Russell Diagram

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

Document related concepts

Dyson sphere wikipedia , lookup

Theoretical astronomy wikipedia , lookup

Serpens wikipedia , lookup

Canis Minor wikipedia , lookup

Chinese astronomy wikipedia , lookup

Auriga (constellation) wikipedia , lookup

Corona Borealis wikipedia , lookup

Constellation wikipedia , lookup

Corona Australis wikipedia , lookup

Boötes wikipedia , lookup

History of astronomy wikipedia , lookup

Star of Bethlehem wikipedia , lookup

Cassiopeia (constellation) wikipedia , lookup

Crux wikipedia , lookup

H II region wikipedia , lookup

CoRoT wikipedia , lookup

Aquarius (constellation) wikipedia , lookup

Cygnus (constellation) wikipedia , lookup

Canis Major wikipedia , lookup

Ursa Major wikipedia , lookup

Hipparcos wikipedia , lookup

Star wikipedia , lookup

Perseus (constellation) wikipedia , lookup

Observational astronomy wikipedia , lookup

Star catalogue wikipedia , lookup

Stellar classification wikipedia , lookup

Lyra wikipedia , lookup

Astronomical spectroscopy wikipedia , lookup

Timeline of astronomy wikipedia , lookup

Stellar kinematics wikipedia , lookup

Corvus (constellation) wikipedia , lookup

Ursa Minor wikipedia , lookup

Stellar evolution wikipedia , lookup

Hayashi track wikipedia , lookup

Star formation wikipedia , lookup

Transcript
Name: _____________________________
Period: _____
The Hertzsprung – Russell Diagram
Background Information:
For astronomers, a graph that displays a star’s luminosity on the y-axis and its surface temperature on the x-axis
sets up an extremely useful diagram called a Hertzsprung-Russell, or H-R Diagram. In 1910 Ejnar Hertzsprung
and Henry Norris Russell discovered that when all of the known stars were put on their graph, several obvious
groups became apparent. By examining the differences in these groups, later astronomers were able to realize
that the groups were best described as stars in different periods in their life cycle, rather than completely
different types of stars. Just as infants, adolescents and adults are in different stages of the human life cycle,
main sequence, red giants, super-giants and white dwarfs are stars in different stages of the life cycle of stars.
Color the H-R Diagram below to show the temperature of the stars.
1. What information is plotted on the vertical axis of the diagram?
2. What information is plotted on the horizontal axis of the diagram?
Pre-AP Astronomy
3. List the colors of the stars from the color of the hottest star to the color of the coolest star.
4. List the four categories of information you can determine about a star by using the H-R Diagram?
5. If you know a star’s color, what other information can you determine?
6. What is the relationship between the X and Y values for main sequence stars?
7. 90% of stars belong to which category?
8. Which star is the brightest white dwarf?
9. What star is the hottest super giant?
10. What is the temperature of Barnard’s Star?
11. Which star is the dimmest on this chart?
12. In which category will you find the hottest star on the chart?
13. What category of stars are hot but not very luminous?
14. Compare our Sun to Alpha Centauri A in terms of group, brightness, color and temperature.
15. Compare Zeta Eridani to Epsilon Eridani in terms of group, brightness, color and temperature.
16. Describe the ways in which Barnard’s Star and Antares are alike.
17. Place the following stars in order of increasing temperature:
Alpha Centauri A, Betelgeuse, Rigel and Sirius B
__________________  __________________  __________________  __________________
18. Place the following stars in order of increasing brightness:
Rigel, Barnard’s Star, Sirius, and Procyon B
__________________  __________________  __________________  __________________
Pre-AP Astronomy