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 Visible Universe. There is an edge to what we are able to see and could ever possibly see in the universe. Light travels at 300,000 kilometers per second (186,000 miles per second). That's top speed in this universeânothing can go fasterâbut it's relatively slow compared to the distances to be traveled.