Subject	astronomer
Predicate	use doppler effect
Object	determine
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.0029
Neighborhood Sigma	0.0029
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source astronomers use the doppler effect to determine the velocities of astronomical objects 1 Answers.com Questions