Surfing close to the wind

摘要

On 4 April 2019, the Parker Solar Probe(PSP) made its second perihelion encounter,passing a mere 24.8 million kilometresfrom the Sun. While waiting for the releaseof data from the first perihelion made lastNovember, Pete Riley and co-workers ransimulations to predict the structure of thesolar corona and inner heliosphere that PSPwould have encountered.