The first time I learned to astral travel or what some will call inter dimensional travel, was from my Spirit Guide Lucifer. He introduced me to it last year. As a matter of fact he is the main being in my life that has helped opened up my psychic abilities.
This experience happened one morning when I awoke and was rushing to get to school because I was very late.
Lucifer has some strange timing in appearing to me.
While I was combing my hair I saw his presence in my mirror. I was like 'what now I am busy come back later.' He responded that he could not come back later and that he needed to teach me something now.
I said that I am late for school. He said this was very important because he does not want me to depend on him alone for knowledge, but to go and experience things for myself throughout the planes in the spirit world.
After our little spat he convinced me to stay home for a half hour later to teach me astral projection. Well the lesson took hours and I missed school that day. Fortunately the class was canceled.
At the beginning I needed help from him to astral travel because I was a newbie at it. But after awhile I was able to do it on my own because of more practice.
The wonderful thing about astral travel is that you meet a lot of various non-human entities.
One of the most lasting memories of my travel was at this place where I encountered a very humble man who was a tall blond. Lucifer was not with me at this time but the man was very gracious towards me.
I asked him 'what do you call this place?' He answered Aldebaran.
When I came back from astral traveling I realized that what felt like seven days in Aldebaran seemed to be thirty minutes on this physical plane. I was totally exhausted.
I did some research on the name and came up with the name of a very giant orange star in our galaxy that is about 65 light years away located in the zodiac constellation of Taurus. It is even larger than our sun.
Because of this experience of mine I am presently doing research on star-gates to see if there are any links to my experience.