Kepler's theory of harmonic motion was later
replaced. What does this mean about
Kepler's work?

Kepler's work was still valuable, because his data
supported laws of planetary motion that
eventually helped with our understanding of how
the planets move.
Kepler probably threw all of his work away
because after it didn't support his theory he
didn't want anyone else to use it.
Kepler's work had no value...he was probably
laughed out of the scientific community because
he was wrong.