![](http://www.alamy.com/thumbs/6/1063D38C-102C-4298-9DFE-D6630B606D03/2ADM1CJ.jpg)
The (28-inch) Grubb refractor telescope at the old Greenwich Observatory, London, now part of the National Maritime Museum.
Size: 3395px × 5121px
Photo credit: © JOHN SANFORD/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: astronomy, greenwich, historical, history, observatory, refractor, telescope, telescopes