The Instagram deal coincided with astronomically high hopes for the Facebook IPO.
If you had such an astronomically disastrous evening, the restaurant may want to make good, so give them the chance.
Your chances of dying in this way are not astronomically high.
1550s, from astronomy + -ical. Popular meaning "immense, concerning very large figures" (as sizes and distances in astronomy) is attested from 1899. Astronomical unit (abbreviation A.U.) "mean distance from Earth to Sun," used as a unit of measure of distance in space, is from 1909. Related: Astronomically.
Inconceivably large: an astronomical price for that car