Of, or relating to astrology.

(astronomy) the astronomical observation and study of objects, cooler than most stars, using the infrared part of the electromagnetic spectrum

One who studies astrophysics.

To astonish, bewilder or dazzle.

(obsolete) Stunned; astounded; astonished.

(astronomy) The detection and study of neutrinos, in order to investigate astronomical objects and the universe.

plural of astronomical unit

(astronomy) A technique that uses radar echoes to examine bodies within the solar system, obtaining information about size, shape, topography, surface density, spin etc.

The branch of astronomy which utilizes radio waves through the use of radio telescopes to study celestial bodies and occurrences.

(parapsychology, Theosophy) A supernatural plane of existence, propounded by esoteric philosophies, some religious teachings, and New Age thought.