dirty snowball
Frozen celestial traveler
Dirty snowball is an informal term for a comet—a celestial body made primarily of ice mixed with dust, rock, and organic compounds.
When a comet approaches the sun, the ice vaporizes, creating the characteristic glowing tail.
The term captures the composition simply: frozen water and gases contaminated with darker debris.
Halley's Comet is essentially a dirty snowball hurtling through space.
Water's solid form
- dustFine settled particles
- rockSolid earthen material
- volatilesEasily evaporating chemicals
- organicsProducts without synthetic additives
carbon dioxide · ammonia · methane · silicates · carbon monoxide · water ice · primordial · pristine
Astronomer's surname, comet fame
- Hale-BoppLong-period celestial visitor
- WildMinnesota's NHL franchise
- nucleusCentral controlling part
- comaUnwakeable unconsciousness
tail · outgassing · sublimation · short-period · long-period · Rosetta · Giotto · Deep Impact
Releasing trapped gas
- sublimationSolid to gas directly
- jetForced fluid stream
- comaUnwakeable unconsciousness
- gas emissionRelease of airborne substances
brightening · solar radiation · debris trail · meteor shower · fragmentation · disintegration · splitting · outburst
Orbital point nearest sun
- aphelionFarthest point from sun
- ellipticalOval-shaped or indirect
- eccentricityUnconventional behavior or nature
- trajectoryPath of moving object
trans-Neptunian · inclination · retrograde · prograde · perturbation · gravitational · sidereal · hyperbolic
ice
Water's solid form
organics · carbon dioxide · ammonia · methane · silicates · carbon monoxide · water ice · primordial · pristine · refractory
Halley
Astronomer's surname, comet fame
coma · tail · outgassing · sublimation · short-period · long-period · Rosetta · Giotto · Deep Impact · Whipple
outgassing
Releasing trapped gas
- sublimationSolid to gas directly
- jetForced fluid stream
- comaUnwakeable unconsciousness
gas emission · brightening · solar radiation · debris trail · meteor shower · fragmentation · disintegration · splitting · outburst
perihelion
Orbital point nearest sun
- aphelionFarthest point from sun
- ellipticalOval-shaped or indirect
- eccentricityUnconventional behavior or nature
trajectory · trans-Neptunian · inclination · retrograde · prograde · perturbation · gravitational · sidereal · hyperbolic · parabolic
- cometscomet, Halley's Comet, comet tail, Hale-Bopp, West