Star Chapter Crossword

3. Cool objects in space tend to glow this color.
4. The law used to relate the temperature of a star and its wavelength of light is known as this.
5. Stars that are much smaller than our Sun are known as these.
10. The apparent brightness of stars in the night sky are measured using units of _________ which was first coined by the Greek astronomer Hipparchus.
11. These are very large, cool stars found on the upper right-hand side of an HR Diagram.
12. These are small, extremely hot stars found on the bottom left-hand size of an HR Diagram.
16. To calculate a star's radius, a mathematical relationship between luminosity, temperature, and radius is used known as this law (found on page 334).
17. Astronomers call the amount of energy an object radiates this, which is shown with the variable "L".

1. In 1912, Ejnar Hertzsprung and Henry Norris Russell plotted stars based on luminosity and temperature to come up with this diagram, one of the most important tools used in astronomy.
2. Stars that are much larger than our Sun are known as these.
6. If two stars have the same temperature, but one is more luminous than the other, the more luminous star must have a larger surface area, and thus a larger ____________ (pg. 334).
7. This kind of star is the majority of stars found on an HR Diagram going from the top left to the bottom right.
8. A star's __________ depicts the energy it emits at each wavelength of light and is perhaps the single most important thing we can know about the star.
9. A star's apparent magnitude depends on two factors: its luminosity and its __________ from Earth (found on page 332).
13. This person actually classified the stars in the Draper Catalog based on the temperature and color of the stars.
14. A star's temperature can often be deducted from the ________ of its emitted light (found on page 333).
15. Hot objects in space tend to glow this color.