This invisible boundary is known as the heliosphere. It's the endpoint beyond which our Sun does not have any reach or power.

NASA's Parker Solar Probe has flown into the Sun's corona. Structures known as coronal streamers and the Milky Way can be seen in the footage it captured. Credit: Space.com | NASA/Johns Hopkins APL/Na ...

The Carruthers Geocorona Observatory is the first mission focused on studying changes in the exosphere, the Earth’s outermost ...