"Gross" and "subtle" material bodies that house and contain the individual jiva-soul, needs to be properly understood. There are two types of material bodies (gross and subtle) that covers the individual soul (the real personal spiritual self)

"Gross" and "subtle" material bodies that contain the jiva-soul or individual life force, needs to be properly understood.

Does one fully understand what what one can see from their gross material body?

Can they perceive all aspects or dimensions of material nature?

The fact is no "gross" material instrument can ever detect "subtle" material energy except acknowledging "something" is there but unable to measure it.

Can modern scientists send a spacecraft to land on the Sun? Or can they see the tropical paradise called Chandraloka on the Moon?

Bhagavad Gita was first spoken to Surya that lived on the Sun therefore those who live on the Sun therefore have an adaptable material subtle bodily vessel that is not affected by the Sun's heat which would instantly destroy our gross material body.

Also no ''gross material lifeless instrument'' can detect ghosts or subtle structures like cameras, microphones, the Large Hadron Collider etc can NEVER detect ''subtle material energy'' because no gross innate dead matter can perceive the ''subtle material universe known as sub-space''.

Also it is important to understand the fact ''you are the soul known as the jivatma'' and is housed in a 'subtle body'' which is further contained in an outer gross biological material body.

So the soul is covered by two material bodies, one is made up of subtle material qualities, mind, intelligence and false ego, the other is gross material qualities like the biological vessel we all get around in.

So clearly the ''subtle body housing the jivatma'' is contained in a ''gross material body.''

In other words, those rear personalities who do see ghosts or the Yamadhutas at death, are not seeing through their gross material eyes but through their subtle body.

The fact still remains that GROSS material instruments cannot be used to see through to the subtle universe.

Unlike those rare souls who have learnt to see the vast subtle universe that both higher material heavenly planets and lower hellish planets exist, through their subtle material body

Most of the 14 Planetary Systems in the Bhu-Mandala universe are therefore unseen by those absorbed and riveted to only their gross material vessel.

This is why modern science think we maybe alone in the material universe because none of their instruments and space probes can ever see or discover the subtle material universe which makes up most of the universe.

13 of the 14 Planetary Systems exist as subtle matter (within sub-space) in the material universe with their own movement of space-time dimension as well.

For example, 100 years on the top most Planetary System Brahmaloka, is 311 trillion 40 billion Earth or human years.