A1S1T1R1O1P3H4Y4S1I1C3S1
22 points
ASTROPHYSICS is validvalid
[n]
a branch of astronomy dealing esp. with the behavior, physical properties, and dynamic processes of celestial objects and phenomena [n]
[n]
a branch of astronomy dealing esp. with the behavior, physical properties, and dynamic processes of celestial objects and phenomena [n]