The two blimps were conducting experimental visual and photographic observations during night flight.

Her intention is to gain sponsorship for further such photographic observations of native Africans, South Americans and Asians.

Her two latest projects are One Day, a twenty-four hour sound and video installation, and Albescent, an ongoing photographic observation of the moon.

The comet steadily faded after August, final (photographic) observations being obtained on 1940-01-16.

In 1924 he made photographic observations of Mars in multiple wave lengths.

This was confirmed in the 1952-1954 Harvard Meteor Project, via photographic observation of orbits.

The photographic observations as done 1959 - 1985 are irrelevant now because of their expense, but lead to some renaissance by electro-optical techniques like CCD.

It is free of coma and spherical aberration at a flat focal plane, making it well suited for wide field and photographic observations.

Beginning in 1968 he made photographic observations at Kleť and extended this activity to minor planets in 1977.

By the time the Paris Exhibition opened only the object lens for photographic observation was ready.