astronomer(n = noun.person) stargazer, uranologist - a physicist who studies astronomy;
is a kind of physicist
has particulars: astrophysicist, cosmologist, al-hasan ibn al-haytham, al-haytham, alhacen, alhazen, ibn al-haytham, anaximander, aristarchus of samos, bessel, friedrich wilhelm bessel, bowditch, nathaniel bowditch, brahe, tycho brahe, anders celsius, celsius, copernicus, mikolaj kopernik, nicolaus copernicus, eddington, sir arthur stanley eddington, eratosthenes, galileo, galileo galilei, george ellery hale, hale, asaph hall, hall, edmond halley, edmund halley, halley, herschel, sir frederick william herschel, sir william herschel, william herschel, herschel, john herschel, sir john frederick william herschel, sir john herschel, hipparchus, huggins, sir william huggins, hypatia, johan kepler, johannes kepler, kepler, gerard kuiper, gerard peter kuiper, kuiper, langley, samuel pierpoint langley, laplace, marquis de laplace, pierre simon de laplace, lovell, sir alfred charles bernard lovell, sir bernard lovell, lowell, percival lowell, maria mitchell, mitchell, johann muller, muller, regiomontanus, newcomb, simon newcomb, omar khayyam, jan hendrix oort, oort, benjamin peirce, peirce, claudius ptolemaeus, ptolemy, david rittenhouse, rittenhouse, henry norris russell, henry russell, russell, giovanni virginio schiaparelli, schiaparelli, harlow shapley, shapley, sitter, willem de sitter, thales, thales of miletus, clyde tombaugh, clyde william tombaugh, tombaugh

1.  An astrologer. Shak. [1913 Webster]

2.  One who is versed in astronomy; one who has a knowledge of the laws of the heavenly orbs, or the principles by which their motions are regulated, with their various phenomena. [1913 Webster]
"An undevout astronomer is mad." [1913 Webster]

N  world, creation, nature, universe, earth, globe, wide world, cosmos, kosmos, terraqueous globe, sphere, macrocosm, megacosm, music of the spheres, heavens, sky, welkin, empyrean, starry cope, starry heaven, starry host, firmament, Midgard, supersensible regions, varuna, vault of heaven, canopy of heaven, celestial spaces, heavenly bodies, stars, asteroids, nebulae, galaxy, milky way, galactic circle, via lactea, ame no kawa, sun, orb of day, Apollo, Phoebus, photosphere, chromosphere, solar system, planet, planetoid, comet, satellite, moon, orb of night, Diana, silver-footed queen, aerolite, meteor, planetary ring, falling star, shooting star, meteorite, uranolite, constellation, zodiac, signs of the zodiac, Charles's wain, Big Dipper, Little Dipper, Great Bear, Southern Cross, Orion's belt, Cassiopea's chair, Pleiades, colures, equator, ecliptic, orbit, astronomy, uranography, uranology, cosmology, cosmography, cosmogony, eidouranion, orrery, geodesy, star gazing, star gazer, astronomer, observatory, planetarium, cosmic, cosmical, mundane, terrestrial, terrestrious, terraqueous, terrene, terreous, telluric, earthly, geotic, under the sun, sublunary, subastral, solar, heliacal, lunar, celestial, heavenly, sphery, starry, stellar, sidereal, sideral, astral, nebular, uranic, in all creation, on the face of the globe, here below, under the sun, die Weltgeschichte ist das Weltergesicht, earth is but the frozen echo of the silent voice o, green calm below, blue quietness above, hanging in a golden chain this pendant World, nothing in nature is unbeautiful, silently as a dream the fabric rose, some touch of nature's genial glow, this majestical roof fretted with golden fire, through knowledge we behold the World's creation.