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Interchange reconnection as the source of the fast solar wind within coronal holes Paper Interchange reconnection as the source of the fast solar wind within coronal holes published in Nature. The fast solar wind that fills the heliosphere originates from deep within regions of open magnetic field on Integrating observations and measurements from Parker Solar Probe Solar Orbiter and other space and groundbased observatories The launch of Parker Solar Probe PSP in 2018 followed by Solar Orbiter SO in February 2020 has opened a new window in the exploration of solar magnetic activity and the origin of the heliosphere. Exploring Solar Wind Origins and Connecting Plasma Flows from the Parker Solar Probe to 1 au The magnetic field measurements of the FIELDS instrument on the Parker Solar Probe PSP have shown intensities throughout its first solar encounter that require a very low source surface SS height to be reconciled with Largescale Magnetic Funnels in the Solar Corona We describe open coronal magnetic fields with a specific geometry largescale coronal magnetic funnels that are found to play an important role in coronal dynamics. Coronal magnetic funnels can be attributed to three Observations of Solar Wind from Earthdirected Coronal Pseudostreamers Lowspeed 450 km s1 solar wind is widely considered to originate from streamer loops that intermittently release their contents into the heliosphere in contrast to highspeed wind which has its source in large coronal holes.