a telescope having an objective with a long focal length and an eyepiece with a short focal length, usually used for observing celestial bodies.
Origin of astronomical telescope
First recorded in 1880–85
Also called Kepler telescope.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for astronomical telescope
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012