Cassegrain reflector, in astronomical telescopy, an arrangement of mirrors to focus incoming light at a point close to the main light-gathering mirror.
The new observatory, while only half as big as the 24,000-pound Hubble, will have a primary, light-gathering mirror 20 feet in diameter compared with the existing telescope's 8-foot reflector.
That play, like the more recent work, examined the ties between mothers and sons, and a gay relationship that is thwarted as much by a failure of courage as circumstance; but Gill tells its story as though gathering fragments of a shattered mirror, the characters' emotions glimpsed in shards.
The amount of light lost by this procedure is very small when compared to the total light-gathering power of the primary mirror.
The meetings, held by the 12 regional Federal Reserve banks, mirrored the extraordinary gathering convened at the height of the financial crisis last autumn, when government officials sought to rescue the banking system from falling apart.
Creating more economic opportunities for women like Mrs. Cigdem is among the goals of the 2011 Global Summit of Women meeting through Saturday in Istanbul as a sort of Davos for women, mirroring the annual gathering of world economic leaders at the Swiss resort.
It was also pointed out that since Syracuse faces the sea towards the east, the Roman fleet would have had to attack during the morning for optimal gathering of light by the mirrors.
Bataille's animal revolt is mirrored in the slowly gathering momentum of the miners' strike.
Nothing of note is going on; just a platoon of soldiers, marching under the gathering clouds, their ponchos and combat helmets mirrored on the ice.
At the end of the 1940s, Lewis participated in the famous Birth of the Cool sessions with Miles Davis, in which the trumpeter mirrored some of Lewis's gathering fascination with softer dynamics, classical textures, and more complex formal structures.
They think of them not just as transportation or even as racing machines but also as curved mirrors passing through their environment, gathering the light, reshaping it and giving it back.
