"The source appears to be about half a degree off the limb of the planet."

The source appears to be young, rapidly spinning dead stars.

Their nature and source must appear on the shipping form.

The American source appears to be a man of similar placement.

The source appears to be a single emergency life pod.

Such light sources may appear to be the same color; this effect is called metamerism.

Their source appeared to be the titanic turbulence all around.

That source doesn't appear in the book's account of the massacre.

Its source appeared to be a small hole beneath another bush.

The source of the dune's sand appears to be local.