* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download H-R Diagram Student
Constellation wikipedia , lookup
International Ultraviolet Explorer wikipedia , lookup
Star of Bethlehem wikipedia , lookup
Dyson sphere wikipedia , lookup
Aries (constellation) wikipedia , lookup
Canis Minor wikipedia , lookup
Corona Borealis wikipedia , lookup
Corona Australis wikipedia , lookup
Auriga (constellation) wikipedia , lookup
Observational astronomy wikipedia , lookup
Cassiopeia (constellation) wikipedia , lookup
Planetary habitability wikipedia , lookup
Cygnus (constellation) wikipedia , lookup
Cosmic distance ladder wikipedia , lookup
Canis Major wikipedia , lookup
Future of an expanding universe wikipedia , lookup
Malmquist bias wikipedia , lookup
Star catalogue wikipedia , lookup
Perseus (constellation) wikipedia , lookup
Aquarius (constellation) wikipedia , lookup
Stellar classification wikipedia , lookup
Astronomical spectroscopy wikipedia , lookup
Timeline of astronomy wikipedia , lookup
Stellar kinematics wikipedia , lookup
Corvus (constellation) wikipedia , lookup
Star formation wikipedia , lookup
Name___________________________________________ H-R Diagram The Hertzsprung-Russell diagram is actually a graph that illustrates the relationship that exists between the average surface temperature of stars and their______________ ______________, which is how bright stars appear to be if they were all the same distance away. Rather than speak of the brightness of stars, the term luminosity is often used. ______________________is a measure of how much energy leaves a star in a certain period of time. The luminosity of stars is affected by temperature and size. Increasing Absolute Magnitude (Brightness) Step 1: Color the different sections of the H-R diagram with the appropriate color. Increasing Average surface temperature (◦ C) Step 2: Answer the following questions using the H-R diagram. 1. What is plotted on the y-axis of the graph? _______________________________________ 2. What is plotted on the x-axis of the graph? _______________________________________ 3. Find the Main Sequence group of stars. What does the H-R diagrams tell us about the relationship between magnitude and temperature for this groups stars?____________________ _____________________________________________________________________________ 4. Name a star that is very dim and red. ____________________________________________ 5. Compare our sun to Alpha Centauri A in terms of brightness, color and surface temperature.___________________________________________________________________ _____________________________________________________________________________ 6. Describe the ways in which Bernard’s Star and Antares are alike. ____________________ _____________________________________________________________________________ _____________________________________________________________________________ 7. Describe three features of the star Deneb. _______________________________________ _________________________________________________________________________ 8. How would you classify the star Deneb? ________________________________________ 9. If you walked out on a clear night and looked for the star Aldebaran, what clues would you use to identify it? ______________________________________________________________ _____________________________________________________________________________ 10. Would the surface temperature of the stars classified as white dwarfs be generally higher of lower than that of the stars classified as supergiants? _________________________________ ____________________________________________________________________________ 11. What is the color of stars that have the highest surface temperatures?__________________ 12. The lowest?_____________________ 13. Sequence the color of the stars from the hottest to the coldest. Hot _______________ Cold _______________ _______________ _______________ _______________ 14. 90% of all stars are classified as Main Sequence stars. What is our Sun classified as? __________________________ What is Betelgeuse classified as?_________________________ 15. How is it possible for white dwarfs to have a lower luminosity than the Sun even though the Sun is much cooler than the white dwarf? _______________________________________ _____________________________________________________________________________ Step 3: Use the H-R diagram below to answer the following questions. 16. Which letter correspond to a sun-like star? __________ 17. Which letter corresponds to a blue supergiant? __________ 18. Which letter corresponds to a white dwarf? __________ 19. Which letter corresponds to w red supergiant? ___________ 20. Which letter corresponds to an old star that was once a sun-like, main sequence star? ___________ Step 4: Use the terms in the word box below to write a summary paragraph on why the H-R diagram is useful to astronomers? color wavelength energy mass temperature brightness