ultracool
Beyond trendy now
Ultracool means extremely cool, used as casual emphasis: That concert was ultracool.
In astronomy, ultracool describes celestial objects with very low surface temperatures—ultracool dwarfs are stars or brown dwarfs cooler than about 2,700 Kelvin, too dim to see with the naked eye but detectable by infrared telescopes.
Substellar object, no fusion
- substellarBelow star threshold
- dwarf starSmall, dense stellar body
- exoplanetPlanet outside our system
- infraredHeat-bearing electromagnetic waves
spectroscopy · methane · hydrogen · helium · red dwarf · luminosity · planetary system · habitable zone
Extremely low temperature
- subzeroBelow the freezing point
- supercooledChilled past freezing, still liquid
- frigidExtremely and intensely cold
- liquid nitrogenCryogenic form of air's main component
liquid helium · cryostat · deep freeze · extreme cold · cryogenics
Extremely impressive or overwhelming
- radExposure measurement unit
- badassImpressively tough person
- epicImpressively grand in scope
- sickUnwell or impressively cool
dope · wicked · gnarly · killer · legendary · insane · mind-blowing · next-level
Impossible to disturb
- imperturbableIncapable of being upset
- collectedCalm and self-possessed
- unfazedNot disturbed or disconcerted
- level-headedCalm and sensible
sangfroid · aplomb · self-possessed · poised · steady · stoic · nonchalant · unruffled
brown dwarf
Substellar object, no fusion
- substellarBelow star threshold
- dwarf starSmall, dense stellar body
- exoplanetPlanet outside our system
infrared · spectroscopy · methane · hydrogen · helium · red dwarf · luminosity · planetary system · habitable zone · transit
cryogenic
Extremely low temperature
- subzeroBelow the freezing point
- supercooledChilled past freezing, still liquid
- frigidExtremely and intensely cold
liquid nitrogen · liquid helium · cryostat · deep freeze · extreme cold · cryogenics
awesome
Extremely impressive or overwhelming
sick · dope · wicked · gnarly · killer · legendary · insane · mind-blowing · next-level · lit
unflappable
Impossible to disturb
- imperturbableIncapable of being upset
- collectedCalm and self-possessed
- unfazedNot disturbed or disconcerted
level-headed · sangfroid · aplomb · self-possessed · poised · steady · stoic · nonchalant · unruffled · even-keeled
- ultra-ultraviolet, ultrasound, ultramarine, ultrafast, ultrahigh
ultracooluncool
Lacking social appeal
lame · dorky · passé · unfashionable · unhip
ultracoolfrantic
Wildly anxious or desperate
agitated · flustered · panicked · hysterical · hot-headed
cool, cooler, coolness, uncool, cooling, coolly, supercool, coolant, coolish