11.   Subsequent industrial design work modified the shape of the cars, which adopted aerodynamic wings and vents to maximize gravitational effects.

12.   Terzian of Cornell said he doubted that the gravitational effects of companion stars could be causing the observed patterns.

13.   The few extrasolar planets found in recent years have not been observed directly, only inferred from their gravitational effects on their parent stars.

14.   The rest cannot be detected directly, and is only inferred to exist from the gravitational effects it appears to exert on the galaxies.

15.   The wobble indicated the gravitational effects on the star of a companion body about the size and mass of Jupiter.

16.   Their presence must be inferred from their gravitational effects on the motions of their stars.

17.   They could deduce that it was there by its gravitational effect on the things they could see.

18.   They look for faint variations in the light of distant stars, indicating the gravitational effects of a planetary companion.

19.   They relied on techniques that detect not a planet itself but its gravitational effect on its neighboring star.

20.   In fact, these planets have not been seen directly, but detected through the gravitational effect they have on the host stars.