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.
So if you look back at the farthest thing you can see, at the very first light visible to our equipment, youâre bound to reach something. In our Universeâs case, to the best of our knowledge, thatâs the leftover glow from the Big Bang: the cosmic microwave background (CMB). But itâs possible that the Universe is infinite; thereâs no reason to believe that the CMB we see is the edge or boundary in any way.