astro-, astr- +

(Greek: star, stars, star shaped; also pertaining to outer space)

magastromantic
A reference to the practice of divination with magic or astrology.
periastron
1. The points in space and time in the orbits of two stars in a binary system when they are closest to each other.
2. That point, in the real or apparent orbit of one star revolving around another (double-star systems), when the former star is nearest to the other star.
radioastronomy
A subfield of astronomy that studies celestial objects at radio frequencies.

Radio astronomy is conducted either with a single telescope or with multiple linked telescopes.

theoastrological (adjective)
A reference to beliefs in a god which is founded on the observation of celestial bodies.
theoastrology (s) (noun), theoastrologies (pl)
A belief in gods that is based on the existence and interpretations of celestial bodies.
unastronomical
1. Having no relationship to the science of astronomy.
2. Not very big: "The cost of this city project was unastronomical after all."

Links to star words Other "star" units: aster-, sidero-, stell-.

Links to astronomical wordsYou may also see an extensive list of astronomy; astronomical terms at this Get Words site.