It seems that after a period of time, Piazzi fell sick and was unable to continue his observations.

Spock continued his observations, his tall form hunched over the science station.

He continued his astronomical observations even in retirement.

It's a great pity, though, that you didn't continue your observations when you took the first photos.

In the mean time Aramis had continued his observations.

Everyone else continue your observations of this ship and try to get me some answers.

Continuing his observations, he said, "True love wants the good of the beloved."

However he was still able to continue his astronomical observations and studies.

I hope that you will continue your very interesting observations.

He continued his observations for over thirty years, and pioneered the study of close binary systems.