Launched in 2018, Parker was 13 million kilometers from the center of the sun when it first crossed the jagged, uneven boundary between the solar atmosphere and outgoing solar wind.

The spacecraft dipped in and out of the corona at least three times, each a smooth transition, according to scientists. The Parker Solar Probe flew through the solar atmosphere known as corona in April during the spacecraft’s eighth close approach to the sun.

Parker also dipped into the corona during its ninth close approach in August, but scientists said more analyses are needed. It made its 10th close approach last month.