An Astronomer searches and maps the skies. He or she studies the stars and other heavenly bodies. It is astronomers who have named the stars and discovered the planets and other galaxies besides our own. It is astronomers who have discovered comets and asteroids racing across the sky millions of miles from earth.
Astronomy is a science, and has been for thousands of years.
The screen at the front of the classroom had a picture of the night sky on it. The stars were like so much lint on a black cloth, so numerous were they. Jose could see no order, no way to identify all of the stars that were on the screen. The teacher pointed to various stars and spoke their names but Jose could not understand how it was that she knew one from another. The teacher then changed the screen and put up a chart showing the constellations.