noun: someone who studies the stars and planets using scientific equipment including telescopes
noun:  a physicist who studies astronomy

See Also

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Astrology
astronomer
astronomy
NASA Astronomy Picture of the Day
astrophysics
Celestial
Earth
Figure 13.01a - Countless Spinning Stars about their common Neutral Center
Jupiter
Mars
Mercury
Moon
Part 22 - Solar Rings and Planetary Formation
Planet
Propositions of Astronomy
Pyramids Telescopes and Light
satellite
Solar System
Sun
Thomas Jefferson Jackson See
Uranus
Venus