Elevation at Death
23
“After being situated in this  yoga  practice and vibrating the sacred syllable  om , the supreme combination of letters, if one thinks of the Supreme Personality of Godhead and quits his body, he will certainly reach the spiritual planets.” (Bg. 8.13)
In this way, all the senses have to be stopped in their external activities and concentrated on the form of  viṣṇumūrti , the form of God. The mind is very turbulent, but it has to be fixed on the Lord in the heart. When the mind is fixed within the heart and the life air is transferred to the top of the head, one can attain perfection of  yoga .
At this point the  yogī  determines where he is to go. In the material universe there are innumerable planets, and beyond this universe there is the spiritual universe. The  yogīs  have information of these places from Vedic literatures. Just as one going to America can get some idea what the country is like by reading books, one can also have knowledge of the spiritual planets by reading Vedic literatures. The  yogī  knows all these descriptions, and he can transfer himself to any planet he likes without the help of spaceships. Space travel by mechanical means is not the accepted process for elevation to other planets. Perhaps with a great deal of time, effort and money a few men may be able to reach other planets by material means—spaceships, spacesuits, etc.—but this is a very cumbersome and impractical method. In any case, it is not possible to go beyond the material universe by mechanical means.
The generally accepted method for transferral to higher planets is the practice of the meditational  yoga