With use of my own words and understanding of the teaching.
A lot actually but not in the way human science speak of the universe.
The teaching speak of many dimensions with many different form of life within each dimension, this human physical realm is the only one that has a physical body, other realm are not physical in the sense we humans understand as physical.
The Cosmos we are in are created for us human beings to be able to repay karma by physical and mental suffering. Without a physical body we would not be able to repay our wrongdoing from the past. The only way we can get access to heavenly realm is by Cultivation of mind and body in a spiritual path (not only Falun Gong).
The teaching is wast so it would have been a very long post og i was to speak about everything within it.
Human science has a primitive understanding of the universe. The problem with human scientists is that they ALWAYS put their desires first. They don't see and then conclude, they decide first and then look for evidence of their decision. That is why they have so many things wrong.
There are eleven dimensions of space/time, although my definition of the word dimensions is not the same as the one scientists accept. Think of a one dimensional string in the shape of a loop, or, hula hoop. This loop flips as it moves through the void. What would be the difference between this loop and a spherical particle?
There are also many universes, more than can be counted. They all exist in the same space, not one on top of the other but each in the exact same area. Think of the universe as the Matrix, just like in the movie. God is the main computer and the main program is "The Universe." So, you could have many copies of the main program running on your computer while the main timeline is untouchable, viewable only.
Karma is a Hindu idea. Like all revelation the idea is somewhat correct and somewhat incorrect. You don't have to pay for your previous life wrongdoing. How could you if you don't even know what you did? But sometimes beings ascend and have to return to start the process over again, not necessarily because of something you did. The universal ascendance process is imperfect.