the GNU version of the Collaborative International Dictionary of English
n. an astronomer who studies the physical properties of celestial bodies.
The Century Dictionary and Cyclopedia
n. An astronomer who occupies himself with astrophysics.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. an astronomer who studies the physical properties of celestial bodies
Word Usage
"Ravi Sood, an astrophysicist from the University of New South Wales who was overseeing the balloon launch, said quick-changing wind conditions can cause difficulties for launching such large balloons."