The term astral projection to describe as a purposeful OBE (out of body experience). In short, it's a way of describing the human consciousness or soul – or "astral body" — temporarily leaving the physical body. Unanchored from its physical body, the astral body can travel to all different places like other countries for example.
Astral projection has been around for thousands of years & in multiple cultures. Because you are consciousness, you have the ability to transcend the physical & experience anything you wish. Many people astral project while sleeping and often awake very tired as their Soul has been out & about traveling all night!
Astral projection is a natural occurrence. If you have experienced a jolt, and been startled from a half asleep state, this is your Astral Body returning too rapidly to your physical form. It can also be consciously practiced to become aware of other levels of consciousness. There are an infinite number of realities, planes and realms in the astral dimension.
You can also set an intention to astral travel & practice getting more comfortable & secure with the experience. You can put yourself in a protective bubble before going to sleep in preparation of potential travel. It is also possible to astral project during mediation. Your consciousness can go off and visit different solar systems, dimensions & more!
Since it is a natural occurrence, it is happening whether you are aware of it or not. Now that you know about it, why not get curious about the different experiences you could have & all the places you could visit!