How is it possible to view the inner planets from the back side of Earth at night?
You can’t. That’s why Venus is known as the morning star and evening star - it is visible either at sunset or sunrise. Mercury is too small to see but can be spotted when it transitions the Sun (with the right setup).
How is it possible to view the inner planets from the back side of Earth at night?
Its surprising what you can see even with a good birdscope