The map is oriented so that the viewer observes the city and Valley of Mexico from the east.

This allows a viewer in the dark side to observe the bright room covertly.

Perception and Assessment- In this step, the viewer simply observes the act of the character.

A viewer might observe that it is also a big sky, a characteristic of the West that has become Montana's nickname.

The viewer may observe at close range the paintings and the actual restoration process.

But the work's technical acrobatics also enable the viewer to surreptitiously observe visitors in other parts of the museum.

Stargazing will be possible as well, at two planetarium shows and through a solar telescope that allows viewers to observe the sun safely.

The viewer observes smooth, flat surfaces that are secluded from the space that surrounds them.

In her historical painting Jones allows viewers to observe the life of descendants of Ethiopia.

In generic black holes, this is not a problem, as an outside viewer cannot observe the space-time within the event horizon.