Later astronomers have re-examined the measurements of Van Maanen, and concluded he had made a serious error.

It was then, astronomers and geologists have concluded, that a particularly nasty rock appeared in the sky.

The two astronomers concluded that no more than 5 percent of the supernovae in such galaxies could be created by the process of accretion onto white dwarfs.

It even has color, astronomers have concluded.

The astronomers also concluded that the eccentric orbits "arise from gravitational interactions with other planets, stars, or the protoplanetary disk" in their early history.

Certain astronomers, for example, have concluded that none of the inner planets could have formed according to the traditional accretion or tidal models.

By comparing these results with standard models, the astronomers concluded that the most likely cause was the gravitational pull of a dense, massive object such as a black hole.

After ruling out other possible explanations, the astronomers concluded, "These characteristics are similar to those that have been calculated for substellar objects called brown dwarfs."

The British astronomer concludes that Mars has seasons and inhabitants.

In the twentieth century, astronomers concluded that the cluster was approximately 13 billion years old.