In his book Shakti: An Introduction to Kundalini Maha Yoga, Shri Dhyanyogi Madhusudandas briefly mentions that the human being is connected to the sun via the energy channel called the Hita nadi. Shri Dhyanyogi Madhusudandas was a Kundalini Yoga master who performed miracles and lived to the age of 116.
Shakti: An Introduction to Kundalini Maha Yoga
by Shri Dhyanyogi Madhusudandas
“Yogis say that there are many similarities between the human body and the entire universe, the microcosm and the macrocosm. The Upanishads say that in the region of the heart is a hollow space the size of the tip of the thumb that contains all things. All elements, all things, regardless of whether they are present or absent in the immediate external environment, are present in this microcosmic universe in the heart.
“There are 101 types of nadis, channels through which prana flows in the subtle body. One called Hita is of particular significance here, for just as a road connects two towns, this nadi is connected to the Sun and energy is collected from the Sun through it. By concentrating on this nadi, one can achieve various kinds of powers, like seeing things happen very far away, having the ability to do healing, having visions of gods, saints, or previous incarnations.”