because kepler was smart
Johannes Kepler (1571-1630), a German who travelled to Prague to become the assistant of Brahe, was studying the orbit of Mars and while examining that data discovered the Laws of Planetary Motion which state an elliptical orbit rather than a circular one.
Cell Theory
A common theory is a theory which has not been proven or a theory without evidence.
The theory is based on replicable evidence. This evidence turns a theory into a fact.
Yes, a theory should be supported by evidence in order to be considered valid and credible. Evidence helps to substantiate the claims and predictions made by a theory, allowing for testing, verification, and refinement of the theory as needed.
A scientific theory is supported by evidence. Without evidence, it is only a hypothesis.
A hypothesis is a statement of theory. Something that is unproven. You gather evidence to support that theory. Gather enough evidence to support and a theory becomes accepted as fact.
Kepler completely replaced Copernicus's theory of the orbits of the planets, which was based on circles an epicycles, with a new theory using elliptical orbits. However Kepler retained Copernicus's idea of placing the Sun at the centre.
If your issues are on the table, then it would be apparent that empirical evidence would trump theory, if the theory on the table were not proven to be true. If the theory were proven to be true, and the empirical evidence does not agree with the theory, then more experimentation would be necessary to determine the validity of the theory.
For their own benefits.
The evidence of cosmic microwave background radiation supports the Big Bang theory.
Yes. Of course it has been considerably elaborated upon, based on the knowledge and technological aids we now have, but his general concepts still hold true.