(geometry) radius

(uranography) Winter Triangle - a bright asterism of the northern winter sky. Its corners are the stars Betelgeuse, Procyon, and Sirius.

(uranography) Summer Triangle - a bright asterism of the northern summer sky. Its corners are the stars Altair, Deneb, and Vega.

scene, sight

model, exemplar, epitome

a rest; a break

bulletin board system (computer system to exchange messages and data); messageboard

calorimeter

publication in a magazine, newspaper, etc.

to go via / to do through