Sentence examples for were first observed from inspiring English sources

Its own polar caps were first observed in 1666.

Since they were first observed by the Viking spacecraft in the 1970's, the spirals have puzzled scientists.

The algae were first observed in 1985, return chronically and are blamed for destroying scallops in the Peconics.

These oscillations were first observed in 2001 by balloon-based microwave detectors.

The ancestry of the viola da gamba, or viol, can be traced to Central Asia, where bowed string instruments were first observed in the tenth century.

The effects of the black hole were first observed last year by two teams of astronomers working independently at the same telescope in Arizona.

The changing phases of Venus were first observed by Galileo in the autumn of 1610, providing key evidence in his championing of the Copernican (Sun-centred) cosmology.

Large numbers of dead lobsters were first observed by New York's commercial lobster businesses in western Long Island Sound in the fall of 1998.

They are clusters and nebulae — physically faded now, yet no less dazzling to the imagination than when they were first observed.

Noctilucent clouds were first observed in 1885, after the eruption of Krakatoa in 1883, and they are on the increase.

Furthermore, the conformational transitions were first observed in the reaction.