They study the terrain, the rocks, the fossils, and the land mass content and structure of the planets in our universe.l
Geologists.
Cats
A planetary geologists
For the same reasons they do so on earth. To pinpoint locations.
the solar system is 4.6 billion years old.
Planetary geologists can examine photos of the geography of planets and help determine what the geology of a given planet might consist of. Also by examining moon rocks, they can maked educated theories about the geology of the moon. With the photos of the surface of Mars, they can analyze what they see and make determinations about any water that might lie beneath the surface.
Not necessarily; it depends on your focus and your definition of Earth. Some geologists study glaciers and climate patterns from the past, which may not be what you define as "Earth". There are also planetary geologists, who study Earth-like processes on other planets and other extra-terrestrial bodies.
geologists!!! ... "biologists" not "geologists"...
The galaxis are bigger than planetary nebulae, that are bigger than planetary systems.
Geologists are people who study rocks and minerals.
Rocks are to geologists as stars are to astronomers.
There are different types of geologists that study oil exploration, mineral exploration and mineral mining. There are also engineering geologists.