Synonyms of astronomical

astronomical

adjective

ˌa-strə-ˈnä-mi-kəl 

variants also astronomic

as in huge

unusually large

a googol is an astronomical number, and the whimsical coinage of the name was intended to suggest that fact

Synonyms & Similar Words

• huge
• enormous
• vast
• tremendous
• gigantic
• massive
• giant
• colossal
• monumental
• immense
• mammoth
• bumper
• titanic
• mountainous
• cosmic
• planetary
• monstrous
• grand
• big
• galactic
• great
• monster
• oceanic
• sizable
• mighty
• prodigious
• heroic
• gargantuan
• mega
• humongous
• super
• whopping
• oversize
• herculean
• cyclopean
• pharaonic
• considerable
• elephantine
• substantial
• staggering
• Himalayan
• jumbo
• handsome
• good
• majestic
• major
• extensive
• vasty
• supersized
• formidable
• gigantesque
• Brobdingnagian
• super-duper
• leviathan
• infinite
• whacking
• supersize
• imposing
• voluminous
• gross
• walloping
• hefty
• king-size
• stupendous
• overwhelming
• outsize
• tidy
• grandiose
• bulky
• goodly
• lofty
• overgrown
• immeasurable
• monolithic
• largish
• august
• hulking
• cavernous
• towering
• boundless

Antonyms & Near Antonyms

• microscopic
• tiny
• infinitesimal
• minuscule
• miniature
• pocket
• micro
• diminutive
• little bitty
• small
• Lilliputian
• wee
• pygmy
• teeny
• midget
• bitty
• minute
• puny
• teensy
• little
• smallish
• mini
• petite
• microminiature
• undersized
• teeny-weeny
• teensy-weensy
• bantam
• dinky
• dwarfish
• half-pint
• pint-size

Example Sentences

Recent Examples of astronomical

Now an Illinois state park, the site includes an excellent archaeological museum, the reconstruction of an ancient astronomical observatory called Woodhenge and scores of earthen mounds. — Joe Yogerst, CNN Money, 27 June 2026

Each case was rare, but the odds against both in the same family at such young ages were astronomical. — Lawrence Ingrassia, STAT, 26 June 2026

These fascinating astronomical objects can tell researchers about how matter gets consumed or expelled from the center of the galaxy and how that may affect other processes in the galaxy. — Mary Ogborn, The Conversation, 25 June 2026

Its Iguana space telescope, with a 200 mm aperture, allows operators to perform space domain awareness and astronomical observations and navigate for rendezvous and proximity operations. — Eric Berger, ArsTechnica, 22 June 2026