Of course it is hard for me now to say how much I saw at that time, because my impressions were corrected by subsequent observation.

Subsequent observations, however, have failed to confirm these distance estimates.

However subsequent observations revealed that a normal host galaxy is probably present.

Subsequent observations confirmed these findings and also detected a cloud of gas around the star.

Subsequent observations have identified a number of different sources of radio emission.

Subsequent observations showed the magnitude difference between the two stars is 3.65 0.03 and they are separated by 0.669 arcseconds.

In 1997 a substellar companion was reported but subsequent observations have not confirmed this claim.

Subsequent observations and conjecture indicate that nearly 90 percent of the universe's mass has never been detected.

Initially a small, faint nebulosity, subsequent observations showed that something remarkable had happened to it.

Although the object was initially believed to be space junk, subsequent observations confirmed that it is an asteroid.