gregorian telescope
Add to My List
Definition(s):
- (n) a reflecting telescope that has a paraboloidal primary mirror and a hyperboloidal secondary mirror; light is brought to a focus through an aperture in the center of the primary mirror
Word of the Day
apprehensive
/ˌæ prɪ ˈhɛn sɪv /
/ˌæ prɪ ˈhɛn sɪv /