
Originally Posted by
Papewaio
If it keeps expanding it will smear the energy over an ever increasing volume.
Imagine you are in a old cold mansion huddled in a room around a star brand pot belly stove with a single log left to burn. Then one of your companions Lee Expansion starts to open the doors to all the rooms. The room you are in will start to share its heat with all the other rooms and yours will get colder. Also your fuel is running out, and in time the last log burns out leaving the room to cool down. Then Lee starts to open all the windows just to put the boot in and you all freeze to death.
If the universe expands the hydrogen that makes stars will be smeared out over further distances making nebula less and less frequent. Nebula are star nurseries so we will run out of stars and lose our heat sources as the universe gets bigger and bigger. So in the very very far future the universe will be very large but also very cold.
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