Halley's
Halley's appears almost exclusively in Halley's comet, the famous comet visible from Earth roughly every 75-76 years, named for astronomer Edmond Halley, who calculated its orbit in 1705.
The possessive form is so tied to this single use that Halley's alone often means the comet: Have you ever seen Halley's?
Icy orbiting body
- orbitCurved celestial path
- periodicOccurring at intervals
- tailRear animal appendage
- nucleusCentral controlling part
1986 · Edmund · astronomer · elliptical · apparition · coma · perihelion · aphelion
Forecast of coming events
- returnGo back again
- sightingsWitnessed occurrences
- Bayeux TapestryEmbroidered 1066 conquest chronicle
- 1066Norman invasion year
William the Conqueror · omen · portent · ancient · chronicles · Mark Twain · birth · death
Relating to mass-based attraction
- perturbationsSmall deviations from stability
- NewtonianOf classical mechanics
- mechanicsScience of motion
- retrogradeMoving in reverse direction
inclination · eccentricity · spectroscopy · composition · volatiles · outgassing · sublimation · albedo
Public recognition, widespread
- iconicWidely recognized, enduring
- celebratedWidely known and praised
- once-in-a-lifetimeOccurring only one time ever
- generationalRelating to age groups
anticipation · viewing · event · media · public · excitement · photography · commemoration
comet
Icy orbiting body
nucleus · 1986 · Edmund · astronomer · elliptical · apparition · coma · perihelion · aphelion · ice
prediction
Forecast of coming events
- returnGo back again
- sightingsWitnessed occurrences
- Bayeux TapestryEmbroidered 1066 conquest chronicle
1066 · William the Conqueror · omen · portent · ancient · chronicles · Mark Twain · birth · death · superstition
gravitational
Relating to mass-based attraction
- perturbationsSmall deviations from stability
- NewtonianOf classical mechanics
- mechanicsScience of motion
retrograde · inclination · eccentricity · spectroscopy · composition · volatiles · outgassing · sublimation · albedo · research
fame
Public recognition, widespread
- iconicWidely recognized, enduring
- celebratedWidely known and praised
- once-in-a-lifetimeOccurring only one time ever
generational · anticipation · viewing · event · media · public · excitement · photography · commemoration · merchandise
Halley'sunpredictable
Cannot be anticipated
sporadic · irregular · chaotic · stochastic
Halley'sfixed star
Star showing no planetary motion
Polaris · stationary · North Star · permanent
- Halley's CometPredictable orbiting frozen body