How much energy is approximately inside the universe pack and how can this be measured? Is there exactly the same

Question: How much energy is approximately inside the universe pack and how can this be measured? Is there exactly the same amount of energy in the universe as millions of years ago? Asked by Anonymous Audience
- Keywords:
  measure,
  time,
  universe
Asked by v4a833t to Saiful, Petra, Jenny, Jawwad, Iain, Bethan on 18 Jan 2017.
- Bethan Charles answered on 18 Jan 2017:
  
  The first part of the question is actually very difficult to answer. We would need to measure the mass of the universe and this is hard to do because the universe is so unbelievably big. Even if we could measure it, the number would be so enormous we would not be able to relate to it.
  
  But the answer to the second part of the question is yes. In our universe energy cannot be created or destroyed (it just transforms into different types of energy)

Question: How much energy is approximately inside the universe pack and how can this be measured? Is there exactly the same amount of energy in the universe as millions of years ago? Asked by Anonymous Audience