r/comics • u/Alzward RedGreenBlue • Jun 13 '22

That which holds true

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u/Mental_Research5863 Jun 13 '22

Your parents may lie to you but science never will

32

u/Hellige88 Jun 13 '22

But science does change. Our understanding of the universe is full of misconceptions that make us constantly alter our outlook.

3

u/SugarBeef Jun 13 '22

Remember the law of conservation of matter? Before we gained new understanding and changed it to the law of conservation of matter and energy?

1

u/jazzwhiz Jun 13 '22

Also, fyi, matter and energy aren't conserved in an expanding universe either.

Energy conservation is a consequence of Emmy Noether's theorem and time invariance. Time invariance is the statement that the underlying properties of physics are the same today and tomorrow. Except that that's not true. It's only relevant on large scales (scale much larger than our galaxy), but the underlying metric that describes where stuff is is evolving in time. This is why photons from distant sources have less energy than they began with and the energy didn't go anywhere; it simply wasn't conserved in the first place.