NASA's Parker Space Probe | Amy Thompson

NASA Prepares the Parker Solar Probe for Launch

The probe, which is scheduled for a July 31 launch, will study the sun’s mysterious corona and the solar wind.

A view of the solar limb sensors: If there is an attitude error, these parts of the spacecraft will see the sun first, spurring the probe to adjust its position. | Amy Thompson
The red wheel on the top of the spacecraft, dubbed the wagon wheel, simulates the mass of the heat shield during testing. | Amy Thompson