The branch of astronomy or physics that deals with the physical properties of celestial bodies and with the interaction between matter and radiation in celestial bodies and in the space between them.

One who studies or practices astrology.

(optics) A defect of a lens such that light rays coming from a point do not meet at a focal point so that the image is blurred.

Causing astonishment.

present participle of astonish

referring to travel in outer space

(medicine) Suffering from astigmatism.

(medicine) One who has astigmatism.

In a straddling position; astride.

In a straddling position on.