Glossary
DR4 Help
 Archive Intro
 Table Descriptions
 Schema Browser
 Glossary
 Algorithms
 Introduction to SQL
 Sample SQL Queries
 Query Limits
 How To
 FAQ
 API
 Download
 SkyServer Sites
 SkyServer Traffic Page
 Web Browsers
 Site News
 Contact Help Desk

nametext
spectrograph The instrument used to obtain spectra of objects. SDSS actually uses two identical spectrographs, each receiving as input 320 of the fibers from a plate.