In the sixteenth century, one astronomer suggested that navigators could observe the moon as it passed in front of different known stars to tell longitude.

VOA: special.2010.07.14

It was released in two thousand five to observe his ninetieth birthday.

VOA: special.2009.09.27

It lets you observe and control your oxygen system.

VOA: special.2011.04.06

In effect, they not only observe the event they're reporting about, they're also absorbing it.

VOA: standard.2010.07.01