Hey my mom makes lasagna all the time and we freeze the leftovers. It will last a good two weeks in the freezer. My advice is to take it out of the fridge and stick it in the freezer. Lasagna is always better the day after it was made, i.e. as leftovers.
Thus, the part of the Universe we can observe (the Visible Universe) lies within a sphere with a radius of 13.7 billion light years centered around the Earth. 1  We can only observe 13.7 billion light years of the Universe. 2  We are only able to see the parts of the Universe whose light has had time to reach us.
The void is an illusion. The universe is certainly not empty, that's a fact, but its not very dense either. Today, the visible universe consists mostly of empty space, void, while ordinary matter accounts for only 4 percent of the total mass. So where is the rest of 95 percent of the universe's mass? In dark energy and dark matter, according to some physical theories. Further still, the void doesn't seem to be so empty after all, but filled with an ocean of elementary sub-atomic and weakly interacting particles.