It sure seems like it should be "meteorologists", but it's not; they study weather.
Meteors are generally studied by astronomers, or (if they land, becoming meteorites) by geologists. There are also a lot of cross-disciplinary areas in science, so a particular researcher interested in meteors might think of himself primarily as belonging to one of those, such as for example a geochemist, while another one doing more or less exactly the same type of studies might regard himself as a cosmologist.
Astronoms
An Ecologist is a scientist who studies ecosystems.
a type of scientist who studies about metal is called metallururgist
what is the scientist that studies motions? A Physicist
A mineralogist studies minerals.
An ecologist studies pollution
The kind of scientist who studies Urology would be a Biologist, since Urology concerns a biological function (urination). If you mean the kind of doctor who studies Urology, that would be a Urologist.
meteoroligists
An Ichthyologist.
Audiologist
cosmologists
Botanist