Why can’t we see Proxima Centauri, the “star closest to the solar system” with naked eyes, but we can easily see Cowherd and Vega?

Proxima Centauri is located in the southern constellation of the sky, only 4.22 light-years from the sun, but…

Human probes have not left the solar system. How is the structure of the Milky Way drawn?

The solar system is on the disk of the Milky Way, and we can only see the Milky…