E-Mail IMAGE: University of Iowa physicists have gained new insights about the sun's electric field. The researchers measured electrons streaming from the sun, a main constituent of the solar wind, to determine... view more Credit: Jasper Halekas lab, University of Iowa As the Parker Solar Probe ventures closer to the sun, we are learning new things about our home star. In a new study, physicists led by the University of Iowa report the first definitive measurements of the sun's electric field, and how the electric field interacts with the solar wind, the fast-flowing current of charged particles that can affect activities on Earth, from satellites to telecommunications.