Typically, astronomers use various types of telescopes. These days, everything is being controlled by computers, so you'd need to include "computers" in any list of tools.
Optical or radio telescope
telescope,spectroscope,spaceprove,viewer
A scientist studying plants is called a botanist.
The scientist studying the brain would be part of the nervous system.
scientist use climate maps when they are studying the changes of things in different climates
Microscope is the instrument used in studying cells, allowing scientists to view cells in detail and observe their structure and function. Different types of microscopes, such as light microscopes and electron microscopes, are used depending on the level of detail needed for the study.
She is studying for the same reason a man would study.
Yes,scientists are still studying the moon
What is there to study but craters...
Depending on where the scientist is studying, the scientist may shelter in a research station, or in a tent if the scientist is working in the field.
by studying the earth gravity by studying eartquakes
Astronomers were actually studying another planet, Uranus.