Quasars form at very large black holes, and are the most luminous objects in the Universe.

Suddenly, a luminous object appears directly in front of the airplane.

When identified in 1982, it was the most distant and most luminous object known.

There was a cry from in back that the luminous objects had disappeared.

A luminous green object fell to the floor and came to rest among the reeds.

In the darkness, it shone almost like a luminous object.

Stars are forming at such an active rate, he said, that the galaxy is "one of the most luminous objects in the whole universe."

Instead and unexpectedly, the luminous object moved away from them, receding rapidly.

It seemed to come from some luminous object about the size and shape of a child's finger.

They may also be seen directly if beamed towards us, giving the impression of an even more luminous object.