. The of the Hubble Space Telescope is better for shorter (bluer) wavelengths of light than for longer (redder) wavelengths of light. 2. The large research observatories on Mauna Kea use giant . 3. separate the various colors of light, allowing astronomers to determine stellar composition and many other stellar properties. 4. The twin 10-m Keck telescopes can work together to obtain better angular resolution through a technique known as . 5. The Chandra X-ray observatory focuses X rays with mirrors. 6. A 10-meter telescope has a larger than a 4-meter telescope. 7. Galileo's telescope designs using lenses were examples of .