[Little Pig]

IIRC, the STEREO probe is supposed to orbit the sun at one of the LaGrange points anyway, to study the sun without interference from the Earth. This is just adding extra mission objectives for the probe as it positions itself for its main mission.

[cripplecreek]

Well the sun does affect us so I guess the cost of that offsets the cost of looking proving the impact theory.

Thanks for pointing that out.