Again, the facts didn’t change, the hypothesis did (the steady state universe wasn’t really a theory).
Observations do not change or evolve, observations accumulate. If I measure the rate of acceleration of a ball as it drops from the top of a tower, those measurements will not change at some future time, unless someone decides to fraudelently alter them. You can’t make that ball have fallen faster or slower, it fell at the speed it fell. An observation, once taken, is fixed. The past is not changeable (as far as we know).
So it doesn’t matter that the next day someone drops the same ball from the same tower and gets a different value. Their explanation for why the ball fell at the speed it did then must also account for why it fell at a different speed when I did it.
If i look at a star using a telescope I see one picture of the star, If I use and infrared telescope i see another picture. Each picture is a seperate observation of the same object that show different data based on different observational techniques. The observations are different, the data is different and the facts are different. The object is the same, but our understanding of that object has changed. With the accumulation of the observations you get a bigger picture of that star, as you add more, different observations based on newer, more evolved technology you gain more data to describe what that object is.
With new, higher evolved technology, our understanding of what is going on also changes, otherwise why are we continuing to look. Our developments are based on neccesity, we dont need new observation techniques to describe the mecanics of a falling object on earth, but we do need more data to test our theories of the cosmos, which do change with the accumulation of new data. If you add observational data to the library of info about a star then the facts about that star change, they become something different than they were before, thay have evolved into a bigger picture.
How many planets are in our solar system. The fact is it is 8, now. 20 years ago it was 9 and 1000 years ago the fact was planets didnt circle the sun. All of these facts are based on observational data. Why did we recently downgrade pluto’s status, because our observances of other similar, newly discovered objects caused us to redefine what planets are (again) as not to crowd our solar system.