PSP
Parker Solar Probe
Exploring the Sun closer than ever before

The Parker Solar Probe (PSP) is an exciting mission of exploration and discovery, the closest a spacecraft has approached the Sun itself. By flying into the Sun’s outer atmosphere—called the corona—the Parker Solar Probe will gather data on the processes that heat the corona and accelerate the solar wind—solving two fundamental mysteries that have been top-priority science goals for many decades. This mission will transform our understanding of the Sun and Sun-like stars, enabling further exploration through our own solar system. It is also taking never before seen views of Venus.
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Launch date: August 12, 2018
First Venus flyby: October 3, 2018
First perihelion pass on the Sun: November 5, 2018
Prime mission: 2025
Lead institute: Johns Hopkins University’s Applied Physics Laboratory
Partners: University of California Berkeley, University of Minnesota, NASA Goddard Space Flight Center, Paris Observatory, Princeton University, University of Michigan, Naval Research Laboratory
The Parker Solar Probe has four scientific priorities:
- Determine the structure and dynamics of the magnetic fields at the sources of both fast and slow solar wind
- Trace the flow of energy that heats the corona and accelerates the solar wind
- Determine what mechanisms accelerate and transport energetic particles
- Explore dusty plasma phenomena near the Sun and its influence on the solar wind and energetic particle formation
The Parker Solar Probe’s science objectives will be addressed through a combination of in situ and remote-sensing observations made from an orbit slightly above the ecliptic plane—the “line” on which most planets orbit the Sun—and at progressively closer distances to the Sun.
The PSP Fields Experiment will make direct measurements of electric and magnetic fields, radio emissions, and shock waves that course through the Sun’s atmospheric plasma. The experiment also serves as a giant dust detector, registering voltage signatures when specks of space dust hit anywhere on the exposed surface area of the spacecraft.