A stellar astronomer would specialise in studying stars.
Bessel
Stellar space, from planets, moons, asteriods to stars, galaxies; The Universe basically
The first person to notice and report on stellar parallax was the Italian astronomer, Giuseppe Calandrelli (1749-1827). He reported the parallax for alpha-Lyrae. The first reliable measurement was made, for 61 Cygni, by the German astronomer Friedrich Bessel in 1838.
The Ancient Indians were the first to formulate the Scientifically based the fixed and the integrated form of the 27 stellar groups which forms the Geo-centric Cosmos!
It traces to the Greek astronomer Hipparchus (or the Alexandrian astronomer Ptolemy-references vary). He classed stellar objects on how bright they appeared - the brightest were "magnitude 1", the next brightest were "magnitude 2", on down to "magnitude 6", the faintest he could see. Thus the scale is roughly 2000 years old.
"Stellar" means "related to a star", so you can use it in expressions such as "stellar wind", "stellar atmosphere", "stellar fusion", etc.
A person who studies the stars is called an astronomer. They partake in the branch of study that is called astronomy. If he specializes in the physics of the stars, he would be an astrophysicist.
An astronomer
The person who studies stars is called an astronomer.
I am an astronomer.
Astronomy, the person who studies them is an Astronomer
Stellar Kart was created in 2002.