According to Srimad Bhagavatam, eventually, if one keeps traveling through this single universe we are in, one will run into the outer solid edge of our surrounding Brahmanda that encases this single universe firstly in solid earth 40 billion miles thick.

According to Srimad Bhagavatam, eventually, if one keeps traveling through this single universe we are in, one will run into the outer edge of our surrounding Brahmanda that is solid earth.

This solid barrier of dirt, rocks and earth is 40 billion miles in diameter thick, which is the first layer of the surrounding Brahmanda that encases our entire single 4 billion mile diameter universe with solid matter.

And that is just one layer out of seven that makes up the Brahmanda we are in.

Therefore Prabhupada said we cannot see outside this small material universe we are in and see other Brahmanda universes.

This is because we are enclosed deep inside our bigger Brahmanda egg shaped universe seen here in photo where millions are coming from Maha Vishnu.

In each Brahmanda is another smaller universe like ours.